Has anyone used SetupBuilder to make an updating program that simply looks
for noncurrent files by comparing isntalled and current CRC information?

Patching is a neat idea but impractical as many updates are created.

Sending all files to a client always works but is always a big download.

I'd list like to make a list of CRC numbers for our "current" files, compate
those with the CRC of the isntalled files and simply download and install
the non-current files.

Mike