I was just surprised that I Had 10 bad games after the flash...Any Ideas why? Its says insert a xbox 360 game with a white screen.

Is this the answer to my question?

ixtreme only boots properly stealthed backups. unstealthed backups are proven to get you banned from xbox live. the 5.3 firmware will boot unstealthed backups, which is why ixtreme exists. it will only boot safe backups that won't get you banned.

I recall all the games being back up the same

Sounds like something in the stealth is not right. Best best is to load XDVDMulleter and you can have it check your disks for you and if something is wrong it will tell you what is wrong.

What method did you use to back them up?? Some of the older backups methods do not produce 100% results..