Not to derail the post too much, but...
I think it is better to have specific animation instead of different colors.
There are specific NWN
animations for dryads and nymphs (maybe nereids and hamadryads too, though personally I think those would be fine as recoloured sirines and dryads).

That beeing said, it is also cool to have colors because IA is tedious to install and may cause problem or crash.
It doesn't crash unless you install it wrong (like on a Russian system without letting it change the codepage) or if you've found some bug no one's reported yet, because there should be fixes for everything that has been reported.
[Edit: um, we haven't ported the dryad or nymph yet, though, just the succubus. It would really help to have some 'porters' since neither of us has much time these days. It's a fairly easy process, just a bit tedious.]
Edited by Miloch, 30 September 2011 - 04:32 PM.