I think I got the result you want with these settings:
Under Options, check the drive containing the temp directories you want to look at. If you uncheck all the drives, the tool looks nowhere.
Under Files to find, uncheck Unneeded files. Otherwise, the tool will scan the whole drive.
Under More, check List all files from the computer's temp directories. You can use the aging parameters as you see fit.
Use Ignore words as you see fit.
The tool picks up the Temp directory of the current user. I don't think you can get the Temp directories of the other users in the Documents and Settings directory structure. Perhaps if you point the environment variables at those directories also ...
Hope this helps.
Tullik