glad it worked for you - and doing your homework made it all possible - however, if you read more carefully, you would have seen to have colored the bioses right away - the M7 bios boots up identically to the standard bios, as does the xecuter (exept for the word xectuer) - by coloring the bios you might have saved yourself some aggravation.
I used slayer's 2.1 (2.5 is now out) and slapped a new hard drive in and let it go to work - there was nothing on the stock hard drive i was interested in saving (my one save game of halo went into a memory card) - if you go that route, installing a large hard drive should take about 5 minutes - and 4 of them is the system formatting the thing.
don't forget to lock the hard drive, and enjoy!