Different redirect pages for different products

I hope I haven't just missed this somewhere after having a good look around!

I need to set up automatic redirects for some downloadable products; currently, after my customer has pais, they come back to my site to download their product. All well and good and all works well... but here's the problem:

1. A book designed to run on a PC can be downloaded and the purchaser contacts me for a registation code.
2. A book of the same title but for the Mac computer has be protected in a different manner altogether and the redirect needs to be to a different page altogether.

I'm not particularly 'au fait' with the 'inner workings' of Zen Cart (I'm running version 1.3.7.1 by the way) and am hoping that somebody here can help!

Thank you in advance,

Terence Watts

I'm running version 1.3.7.1 by the way
That version is over 4 years old
See support life cycle
http://www.zen-cart.com/showthread.php?72868-Zen-Cart-Software-Support-Life-Cycle

It also has many known vulnerabilities and you should upgrade

Thank you - my web designer seems to think there might be an issue created by upgrading :( If I do it anyway, is there an answer to my query, do you think?

A book of the same title but for the Mac computer has be protected in a different manner altogether and the redirect needs to be to a different page altogether.
Can you expand on what differences there are??

Thanks - the PC versions are .exe files and the Mac versions are protected PDF that have to be registered via a page on the website of the company who creates the protection system. I've contacte the web design company about upgrading the cart but haven't heard anything back yet.

Thank you for your help!

Terence

he Mac versions are protected PDF that have to be registered via a page on the website of the company who creates the protection system
But are the files on your server for downloading??

I've had to abandon the idea :( It turns out the Mac files were going to be hosted on somebody else's server AND couldn't be accessed while offline... totally ridiculous for ebooks!

Thank you for your help.

Terence