>Peter,
>
>I recently had a significant problem with my IE not being able to cache more than about 200 files, needless to say this greatly annoyed me because I think the UT uses about that many images in here so stuff was constantly being redownloaded. I did the delete temp files, byt hand in explorer and also from the IE options dialog. That still didn't help. As you found while Windows is running you can't touch index.dat.
>
>Create a boot floppy
>reboot you box to DOS
>cd to the folder
>delete index.dat
>reboot the box

Alternately, hold F8 while booting and choose Safe Mode w/ Command Prompt, it's equivalent to what you get by boot floppy, only faster. You also have unique chance to do a regular uninstall of Outlook Express and NetMeeting (IOW, to delete the files in these directories - there's NO UNINSTALL for these at all).

Another tip here is to edit the desktop.ini in content.ie5 directory and just change the GUID line to something benign. The directory will function just the same, but will not play hide and seek anymore.