Just a side note that I don't think anyone mentioned, even if your games are in the right folder, you may still need to use the "Refresh" option from the game column of the XMMB of Multiman in order for the list of games to update.
Also, as others have said, Multiman is a much better backup manager than most, and Rogero would be the next best in my opinion. Just toss your games into X:\GAMES\*game folders here* and you'll be able to detect them with MM.
That said, you seem to have things under control thus far
Feel free to drop a PM if required. I like to consider myself at least half-way knowledgeable about the PS3. XD