I plan on making a lot of stuff editable not only using files, but things such as what items you're allowed to hold (grenades/meat/rocks) etc. using game commands loaded from level file data (or changed in the game console). So in with the instructions for the game to build the level, you'd have something like:
SSET CANHOLD ROCKS,GRENADES
I've worked out an idea for how possessing stuff will work, it's pretty simple actually and should be quite flexible when it comes to making new stuff. For now, I'm working on getting the ANIMDEFS done in a nice way.
Looks easy enough for now...