Morning,

Right, (note down your md5 passwords) Click the remove module on your old one, copy everything as is to your server, putting the admin files in admin and the includes in includes. Then install, fill out your passords and you will have to put a "payment response password" in no and then do it over at worldpay to make your system hacker safe.

In all likelihood the new module will also warn you of old files on your system that are potentially vulnerable and should be removed manually (e.g. deleted)

If you have problem then enable debug mode which will email whomever, with what worldpay is sending to your server, do not post a debug email to the forum as it contains your passwords !

The module has been tested for 1.3.7 and above versions of ZC if it's an earlier module you may need more help, als you will have a new page under customers called WorldPay Payments, that gives you much more detail of each transaction and also of repeated cancelled transactions (which may be honest or maybe someone testing out a list of dodgy credit card numbers).

Thank you

Philip.