(Make a backup of your original map before following these instructions!)
Something you can try is opening your map in Doom Builder, then going to Edit -> Map Options and changing the configuration there. After that, you'll probably have to change all of the line specials throughout your map because their numbers change from one format to the next. If this method doesn't work for you, another way is to select all of the sectors and copy them, then paste them into a new map with the configuration of your choice, then do the same thing with all of the "things" in your map. That method is less precise and requires a bit more work, but it's fairly fool-proof since you're just copying sectors and things rather than converting a map that's already in place.

Thanks man, I appreciate it. If you ever need any help with switches, doors, or anything like that using the "Doom in Hexen format" configuration, be sure and let me know!

Neato.

Eek!

Woo thanks for the sub! ^)^