Alright, I did some more digging. The utility you need is called the "
Fastconv Extraction tool". However, the bad part is, Microsoft doesn't have it available anymore!
You *may* be able to call them and have them send it to you. I have thoroughly searched the internet for this utility, and came up empty. (There are other utilities by the same name, but are not the tool you want.)
FYI, I found a description of the Fastconv tool on google's newsgroups, which tells you how to use it, if you are able to obtain the tool.
Fastconv Extraction tool
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Furthermore, I did try renaming the file to ".cab" and ".zip", and I had no success.
Good luck!
- rp