What lptech posted may help. This is a pretty simple task. The way I would approach it is to:
1. Create a script task (whatever language works for you) that compares the files on Server A to Server B and copies the "new" zip files into a different folder
2. Create a Foreach Loop Container that uses a Foreach file Enumerator against the folder mentioned in Step #1 and does what ever you need to each file.
-- Itzik Ben-Gan 2001