I have posted this before but have yet to get adequate answer.
I really need help in setting up a feature that enables client to upload an more detailed spec or description sheet associated for a particular product.
I wish to have this done in the same way an image is uploaded.
This PDF upload feature would greatly increase zen cart's flexibility.
So I need help to get code for the back-end (admin product page, automated database page) and the Front-end (placement of PDF spec sheet and PDF icon)

Any constructive input would greatly be appreciated.

Cheers