Just maybe a little help for extracting from cab files.
There's two types, one is accessable by any number of archive programs, the other is the kind used in most installation programs.
Since I'm not sure the exact terminology to use, I'll say the second type is encrypted. There is a program that will extract from these archive files. It's called Zipscan.
You can download a trial version here: http://www.zipscan.co.uk/
It was the only thing I could find that would work.