In a comment to an earlier post an anonymous, self-described "aspiring 3.0 gm" asked about conversions of old Gygax modules. Here's the conversion of Keep on the Borderlands that I used back when 3e came out:
You'll need a copy of the original module to make use of the notes at that link. As I recall the conversion worked out pretty well until I went and screwed things up by experimenting with these weird new 'template' rules. At the time I hadn't really bothered to read what an 'ECL' or 'CR' was supposed to be. The look on Rod's face when the gnoll breathed fire was almost worth nearly wrecking the campaign.
SWN Session Zero
1 hour ago