Hi, although it is very nice that you want to make maps, you can only use stuff that is already in the mod. Check the gamefiles, maybe you can already find something which fits your needs. The devs make stuff they think is needed for the mod, or they make it on a mapper's request. But, that only goes for mappers in the devteam.
So there are two solutions for your problem I can think of:
1) make the stuff you need yourself
2) apply to the team to become a mapper