xBox Help, Please?

[mnr311]

Hi there everybody,
I have a matrix (from xodus) and I have flashed it with a working bios. I have been reading about the xbox not being able to read cd-r's or not being very reliable on cd-r's but would read cd-rw's. I havn't been able to get the xbox to read cd-r's or cd-rw's. Do I need a DVD-R ??? I have also heard that it takes a few reboots for the xbox to read evox iso backups?

Any Help would be great.

Thanks

-Matt