Thanks for your reply.
No Paypal Express Checkout is required at this time, just Paypal Standard. I have outlined a basic requirement for my Powerstore here for your information, please see below:
A customer adds an item to the cart, clicks checkout, prompted to register (only shipping and billing information should be displayed - no credit card form fields). If already a customer then just login as normal with Powerstore.
After logging in or registering the customer can checkout and click the Paypal button as a Payment option click Proceed. Now when this happens, the customer jumps to paypal and enters the credit card details - the register form fields are populated in paypal. After paying in paypal, the customer clicks the return to website (my Powerstore) with a message to say thank you or something.
Now the customer can view the history of order receipts or change profile as normal with Powerstore.
Shipping will be per cart total - if below £200 then shipping will be £20, if more than £200, shipping is free.
Please can you tell me how much this is going to cost? Im using the original Powerstore files and haven't modified it.
I hope this information helps you. Many thanks in advance.