The way I made it work:
I downloaded the file http://minnow1911.tripod.com/mm7_XP_patch.sdb.
Because of some tripod ads, what you see is the contents of the file plus ads. To download the file properly, use a download manager like FlashGet, paste the URL to the manager and download it. If you can't get this to work, I have the file. (since I don't check here too often, better mail me and hope mail doens't go with the rest of the spam ;o)
After you download it, open the Toolkit, click Open and target the file. It should load ok. Now, if you try to run it, it will seek for the mm7.icd, and it won't be able to start anyway because it is not an executable. So run the proper .exe from your HD.