Fist you will need to download the ePDQ zip file to your hard drive.

You need to copy the files customppsend.asp and customppreturn.asp from the vsadmin/inc/ directory of the download to the vsadmin/inc directory of your site. Before doing so, open the file customppsend.asp in notepad and at the top you will see the line . . . yourmerchantname = "SetMerchantNameInCustomppsend"
You need to change this to your merchant name which should be a maximum of 30 characters.
Now copy the vsadmin/epdq directory and the file it contains to the vsadmin directory of your site.

Step B: Confirm that the epdqconfirm.asp file works ok.

The file vsadmin/epdq/epdqconfirm.asp needs to know what the database connection is, so needs to "include" your database connection script. However, different hosts have different ways of configuring their security so we just have to check that everything is ok. To do this just open the file epdqconfirm.asp in your web browser by entering its URL in your browser address bar.
For instance it could be . . .
http://www.yoursite.com/vsadmin/epdq/epdqconfirm.asp
What you should see is nothing. Just a blank page. If you receive any script errors along the lines of this . . .
The Include file '../vsadmin/db_conn_open.asp' cannot contain '..' to indicate the parent directory.
. . . then we have to try a different approach. If this is the case then open the file vsadmin/epdq/epdqconfirm.asp in notepad and at the top you should see . . .

< !--#include file="../vsadmin/db_conn_open.asp"-->
and change that to
< !--#include virtual="/vsadmin/db_conn_open.asp"-->

If your store is in a sub-directory then add the sub-directory to the path like this . . .
< !--#include virtual="/subdirectory/vsadmin/db_conn_open.asp"-->

If you STILL have an error, then replace the include line with the actual contents of the db_conn_open.asp file. In this unlikely case you will have to remember that if you change your database connection then you need to change it in the epdqconfirm.asp file also.

Step C: Protect the epdq directory with basic authentication.

Barclays ePDQ requires that the directory containing your epdqconfirm.asp page is protected with basic authentication. On a windows server you need to ask your host to do this by sending your host an email along these lines (obviously changing yoursite.com as appropriate) . . .

Dear Host
As part of the implementation of the Barclays ePDQ payment processor we need a directory on our server username / password protected with basic authentication. Could you possibly apply a username / password to the directory http://www.yoursite.com/vsadmin/epdq
Many Thanks

Once this is done, if you now try to open the epdq/epdqconfirm.asp page in your browser you should be prompted for your username / password.

Step D: Configure the Ecommerce Plus settings.

Log in to your ecommerce plus admin section and click on the "payment providers" link on the left. Now in the list of payment providers click on Modify for "Custom".

Enabled should be checked.
Demo Mode does not apply to ePDQ.
For Data 1 enter your ePDQ Client ID assigned to you by Barclays.
For Data 2 enter a secret phrase up to 16 characters known only to yourself. This can be anything you like, and the more random the better. Make it hard to reproduce . . . for instance "my45secwet8189zs". Take a note of this as we are going to enter this in the ePDQ admin panel later.
For Transaction Type you should set "Authorize Capture" if you want ePDQ to deduct funds immediately from the cardholders account. You should set "Authorize Only" if you want ePDQ to check the cardholders card for availability of funds only. Later using your ePDQ control panel you will need to actually "capture" these funds. Please note that it is now required in some countries that you only use the Authorize Capture method if you can ship immediately or have
obtained the cardholders agreement for any delay. Otherwise use Authorize Only and "Capture" the funds when you can despatch the goods.

Step E: Set your own Username and Password (Taken from ePDQ epdq_mandatory.pdf guide).

You will require a separate user account to integrate the ePDQ CPI with the Ecommerce Plus template. This should be different to the account provided for access to the Store Admin.
Your Store Admin user role is set at ePDQ Level 4. The URL you need for your unique store admin URL which was supplied by Barclays and which will be of the form . . .
https://secure2.epdq.co.uk/cgi-bin/ClearCommerce_Engine/xxxxx
. . . where xxxxx is your store Client ID.
1. If you do not already have your Store Admin password login details please contact the ePDQ eCommerce Support team on 0870 60 80 355.
2. From the User Configuration Page (Please see the ePDQ User Guide section "Controlling Access to your Store for details), select Add.
3. The Add User page will be displayed. Enter the details as required. The User ID must be at least 8 alpha/numeric characters and can be up to 32 characters. It must not contain any special characters (such as *,/,\_,-). A User ID such as CPIUser1 is recommended. The Password must be at least 8 alpha/numeric characters and must not contain any special characters.
. Enter the Password again for validation purposes.
. Enter a Password Prompt. This must not be your password and must not compromise the password (i.e. "same as user ID").
. Account Name and Account Description are optional, though entering a name and description such as "CPI Integration User" and "User for CPI Access only" is recommended.
. The Role is the level of permissions you wish to assign to the user. Use the drop down list to select the role of CPI Access.
. Set Pagination size according to how much data you wish to have displayed on each page.
4. You should elect for an email to be sent to the merchant confirming the creation of a new user.
5. Once you have entered all the details correctly, select Add. If you have entered any details incorrectly and wish to clear all fields, select Reset.
6. The new user will now be created, and can be viewed from the User Configuration Page.
7. Log on as the new user to confirm the user had been created correctly.
8. Sign off from the engine.

Step F: Setup the ePDQ Configuration Pages.

Log in to the following URL using the login / password you have created.

https://secure2.epdq.co.uk/cgi-bin/CcxBarclaysEpdqAdminTool.e

You want to fill out the form with the following information.

Client ID: As supplied by Barclays
User name: The one you used to log in with
Password: The one you used to log in with
Pass-phrase: A secret phrase you choose up to 16 characters. This should be the secret phrase you used for "Data 2" in the ecommerce plus payment provider admin.
Allowed URL: The URL of your Ecommerce Plus cart page. For instance it could be
http://www.yoursite.com/cart.asp
Continue Option 1: Probably best set to no, but see your ePDQ documentation for more details
Continue Option 2: Probably best set to no, but see your ePDQ documentation for more details
Continue Option 3: Probably best set to no, but see your ePDQ documentation for more details
POST Order result: Yes
POST URL: The URL of your epdqconfirm.asp page. This will be something like
http://www.yoursite.com/vsadmin/epdq/epdqconfirm.asp
POST User name: The username used to protect the directory containing your thanks.asp page
POST Password: The password used to protect the directory containing your thanks.asp page
POST Email: Merchants email address

Step G: Testing.

Barclays ePDQ does not provide a test mode as such. You can use the following Visa number 4111111111111111 . . . with the expiry date . . . 12/2004
Which will always result in a DECLINED result. However there is not a way to generate a SUCCESS result except by trying a real live transaction with your credit card. In this case Barclays recommend you set up a test product with the price £11.11 so that it is easy for them to cancel the order.