I whant to create a Subrace. How may I do so? Is it only possible for multiplayer or can I generally create one. I know that it is somehow possible with the toolset, but how? Please help me!

Right, when creating your Character, either for Single or Multi-Player, when choosing your race.
Select ELF for example, now press the button below that says SUB RACE, and type in DROW.
Now when you 'Customize' your character, give him dark blue/black skin, white hair etcetera. It will say you are a 'Drow' when you look at your Player Record.
It is not possible to get innate sub race abilities.

Actually, it is to a point, Gopher. Create an item that contains on it all the bonuses/penalties of that subrace, then give it to the character.

The only problem is, is that some qualities can't be put in and you need a 3e rulebook to know all the rules.

turn of level restrictions and make the resistance 31(11+1 for each lvl)

I know alle the 3ED rules pretty well, but if I do it that way, there is still the minimum Level for item use. And how should I managa something advancing in Level, like drow Spell Resistence? That is my problem. Any Ideas?

Oh yeah sure Rastor, that works. But i meant naturally. :p Some guy on NWvault has already made a mod where you can become subraces (given special abilities etc through rings, and new skins) but it sucks big-time.
It just doesn't work.
:D