[SCRIPT] Two things im not sure how to do

[serbusfish]

First of all I know there is a script that makes the game forget what it has loaded in memory for use when you've entered a level and you dont need to return to earlier levels, anyone know what this is? Ive seen it a while ago but didnt write it down.

Also i was wondering is it possible to make the map change if an enemy kills you? Or can map changing only be done via level doors?