The BIA used to publish and regularly update a document called ““Questions and Answers Regarding Proceedings before the Board.”  The BIA practice manual still refers to it as if it still exists, but if you go to the previous web address for it, you get this:

“Due to public familiarity with the BIA Practice Manual, the ‘Questions and Answers Regarding Proceedings Before the Board’ has been discontinued. August 2010.”

UPDATED- September 16, 2013 – 

When this post was originally written, there were still several versions available online.  The DOJ has since removed them from its website.

There are still versions available online elsewhere though.