Hi Marius:
You may want to look at a program designed by Dennis Wish, dennis.wish@verizon.net, member of this List Serve called Multi-Lat. It is a free download. I have used it for several projects. Excellent. As I understand, Dennis is updating the software for the 2006 IBC.
Our structural office tried the Wood Design software and did not continue with it.
Respectfully,
IDS Design Group
Bob Freeman, AIA, EIT
(949) 387-8500