[Hampshire] extracting .exe file for NDISwrapper

Problem: get a wireless card going properly in Kubuntu. The card is a RaLink

RT2500.  
Therefore install windows driver with NDISwrapper    

Tried:  Unzip.  response:- unzip: cannot find zipfile directory       
            install cabextract  result:- not in respository 
           Google again for some more solutions.

Currently trying to loop mount the .exe as per the Answer Gang's advice here
<http://linuxgazette.net/issue82/tag/1.html> (mutatis mutandis)

I am failing because I do not know the file type of an .exe file and am not
succeeding in guessing it.

So - if that is a good method to be trying to use, what is the filetype of
an .exe file?

OR what ought I to be doing?

The card works otb on Kubuntu 7.04, but sadly not in 8.04 (or 7.10, come to
that). :-(

TIA
Lisi