Please give me directions, ...

being new to the interface and all -- I've got my API credentials from PAYPAL but I'm totally lost where to enter this info on the zencart. Please instruct a newbie! thanks

Go to Admin> Modules > Payment

find PayPal Express Checkout. Click the Install button then complete the fields accordingly. Carefully read the instructions for every field.

Frank

frank, as I already mentioned : this is the first time ever i'm digging into zencart, hense: excuse my ignorence; I followed your instructions and there's a couple of conditions mentioned which are ambiguous in their meaning, for example when I'm in the edit UI, it sais "Requirements:
*Express Checkout must be installed and activated in order to use Website Payments Pro, according to PayPal Terms of Service.
" does this mean I must additionally and manually get this module somewhere and install it?; i went to /html/includes/modules/ (hard path) as my UI said, and there were several files named paypal, neither of which had in comments or whatever "put your credentials here" ; if you can help me get this going, frank, I'll be so grateful... you'll see

everyone -- you rock! i found this thread: http://www.zen-cart.com/forum/showpost.php?p=365905&postcount=10 followed directions and --- presto: paypal express checkout! thank uuuu!

Just read your PM - I see you are up and running now. There is also a wealth of information to be found in the Tutorials section:

https://www.zen-cart.com/tutorials/index.php