As many of you have probably guessed, I no longer have the time to actively chase down iwg2 bugs. The differences between the iwd2 and bg2 engines make a "simple" bg1tutu-style conversion impossible. As posters to this board have noticed, many rough corners remain to be manually sanded.
In fact, real-world responsibilities have kept me away from the world of BG2 modding for quite some time -- I haven't even had a chance to read all of the posts in this forum, for example. My thanks to those who took the time to report bugs here.
The beta version is now publically available from
http://weidu.org/iwg2/ -- have as much fun with it as you like.
If you are interested in taking over the maintenance of the iwg2 project, let me know.