does anyone have flashed xbox 360 in also is achievement hunter?

I was wondering if anyone have flashed xbox 360 in also achievement hunter? I was wondering because i really want get gamerscore up in about the 200,000 -300,000k range. i have 100k legit gamerscore but in order get gamerscore higher you need play easy gamerscore games like kid games,sports games,avatar, nfl mlb 2k6, madden 06, etc but the games are hard find & cost alot in with flashed xbox i could just download them to a disc. i just wanted know if other achievement hunter have flashed xbox because i feel more comfortable