Ambidexterity doesn't exist in NWN2. Instead there are three feats, called two weapon fighting, improved two weapon fighting and greater two weapon fighting. There are allso two weapon defence and improved two weapon defence...
The requirement is the following TWF: dex 13, ITWF Base attack bonus: +6, dex 15, GTWF: base attack +11, dex 19 (and ofc the lower feat ie TWF is required for ITWF).
Note that you can get all those feats for free as a ranger who focuses on the Two weapon fighting style <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />. All you have to do is get a ranger lvl 11 and only use light armor...
All found in the manual.
Download the manual here! <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />
Übereil
