Yep, that's what its for.
The most common usage is probably for triggering invulnerability, but the best use is for triggering events in case you get stuck on the missions.
There should be a list of the codes around here somewhere...
http://www.shrapnelgames.com/cgi-bin...=000104#000002
[ January 23, 2004, 00:06: Message edited by: Suicide Junkie ]