Hi,
New Zencart user, I am researching Zen capabilities for a business card printing client.
I need to ensure an image has been uploaded to the web server before going to checkout.
I was hoping to add another page between the cart and checkout that would perform the upload and do some checks. It the checks passed it would go to checkout, if they fail it would go back to the cart.

Has anyone done this or something similar?
Can it be done this way?
Any help pointing me in the right direction would be appreciated.

Thanks for any contribution

Ray