I'm new to Zen-Cart and I haven't installed any versions yet, simply b/c I'd be converting from a very expensive CubeCart (which I hate) version that has custom plug ins and a version that is no longer supported by their support help desks. Lame. Anywho, a few of the major concerns I have regarding upgrading to ZenCart are below. Any help or information regarding these things is GREATLY appreciated!

The key features need are:
1) Secure digital download (ie one-time/few-time links),
2) Server paths to files (so no multiple copies are needed on my server),
3) Date order and scheduled release dates (I need to bulk upload & pre-date the release of items on front-end of the site),
4) ccBill payment processing (which I found at least one paid module for)

Thanks again for any help I may get here!