ok i tried removing falling damage in my globals because my custom extinction and hugeass dogfight cause you to die from falling. i tried replacing globals, but that exploded in my face (sapien closes upon opening) now you have 1 of 2 options, preferably the second:
1) send me parameters so i can replace my falling damage
2) tell me how to make no falling damage

I'm pretty sure you can edit that trait in the biped tag.

You dont remove the falling damage, you extend it to a massive number :D its what I done in one of my maps (in globals under "falling damage" under harmful falling distance). Example if its a massive map then put 3000 to 3001 units. Hope I helped.

Wow, you guys are retarded.
Go to the biped tag, under $$$UNIT$$$, check "Immune to falling damage".

another question: how do you switch the default biped, and how do you compile scripts?

Switch the player biped in globals under two fields.
Find the two fields that list a biped and switch them out for yours.

Compile scripts by putting your scripts in your level directory under data.
Then in sapien, open the scenario and goto file>compile scripts.