Initializing Transactional Replication From Backup
Putting the comments into an answer so the question can be marked answered:

@crummel4 says, "See the third section from the bottom of http://replicationanswers.com/NoSyncOn2005.asp titled How "initialize with backup" Works, and How to avoid Pitfalls"

@Kin says, "For step by step instructions, please refer to http://www.mssqltips.com/sqlservertip/2386/initialize-sql-server-replication-using-a-database-backup/ or http://blogs.msdn.com/b/repltalk/archive/2010/03/16/deep-dive-on-initialize-from-backup-for-transactional-replication.aspx