Image Product attribute

Hi,
I have only started developing my website with zen cart so very much a newbie. I have searched the forum but I am unable to find an answer to my problem:

I need the customer to be able to upload a photo for certain products. I can set the product attribute by doing the following:

Add an Option Name, e.g UPLOAD ... with the Option Type of: File

Then add the Attribute to the Product using the:
Option Name: UPLOAD
Option Value: TEXT [RESERVED FOR TEXT/FILES ATTRIBUTES ONLY]

However with this the customer can continue to checkout without uploading their photo, is there any workaround to ensure the customer MUST upload their photo ??

Thanks

Hi all, just wondering does anybody have an answer to the above problem?:(

In admin > Catalog > Attributes Controller > display product > edit attribute,
find the red box labeled
Attribute Required
for Text:

Cheers gjh42, I appreciate your help.