Ooooh, soapbox!
Ahem
I completely agree with Hottentot, I've tried my hand at modding a couple of times, and whilst some games are more open-ended than others, it's still a sod of a task that requires a lot of manpower to put into it, and the closest I've got is the odd badly made map.
Therefore, I can only echo the stutterer in thanking YOU the modders, for your time and creations.