You use triggers, with the type set to end#1, end#2, end#3 (etc) or lose. Then set the condition to anything you want, and you will get the corresponding ending. If you use 2 different triggers both set to the same ending, then it will work as an "and", so both will need to be fulfilled for the ending. To use an "or" use 2 different ending numbers.
Eg.
end#1
condition - east - not present
end#1
condition - getdammage player < 0.5
end#2
condition - west - present
These 3 triggers could be used to finish if:
the enemy is cleared form an area
and you haven't hurt yourself too much
or you reach a certain area.
Obviously, you can use as many as you want.
Hope this helps.
-=GC=-Fungus1999