Searching inside files inside XP

Can anyone remember how to turn off that crappy 'feature' in XP whereby if you try searching for text strings inside files it only returns results within txt files? (Ie you can't search for anything in a .bb file for example)

I've sadly forgotten how to disable it :(

Use 'method #2' here:

http://www.petri.co.il/windows_xp_search_bug.htm

Ta James! :)