Code, errors? Did you try Low-level member data reading?
I figured the key is probably in the low level routines. I didn't get too far with those (yet anyway). The issue is that the low level routines are member oriented. So I first have to know what members are in the zip file. In order to get members, you first have to read an existing zip file. The read method fails. After that failure none of the member methods return anything.
Next I was going to take a corrupt zip I was able to read using one of the many Windows zip readers that handles corrupt files and try pulling members it tells me exist using the low level methods -- bypass the necessary step of having to first identify the members for now.