Okay, I downloaded a disk that allows you to swap games.  Its origionally a DVD thing to launch DVDs but you can launch games too, which is how I load burned PS2 games ( I own the origional 

 ).  When I open it, the screen says something like DVDregionx or something like that, so look it up.  What it does is take over your boot sequence, so that the PS2 realizes a game, THEN you are free to do what you wish.  Dont think this will help, but thats your boot tool.