Hi,
I have worked on YAF forum, I know the db design of YAF forum. As you facing issue in restoring .bak file of sql server on mysql db, I think I can do it in more better way as I have worked on projects to upgrade db from MySQL to SQL Server 2005.
I need to look into the issues you are facing,deployment environment, proper deployment of database. I have taken 3 days to complete this task, if everything goes well it can be done in less than that.
If you want some more coustomization in YAF forum I can handle that also.
Thanks,
-deep