Illuminatus, I WAS initially using Archive::Extract, but had to switch for a couple of reasons. I am on windows (because I can't convince the unix admin to allow me to store these files on the server) and since there is no bin/tar for windows, I have to use perl to do the unzipping which requires system memory. So much memory is required, that I get an "out of memory" error when extracting.

Anyway, the files are all different in each archive.