I just modded a friends xbox with a Xenium. Everything seemed to work fine and flashed fine using a bios (evox M7) from a CDR. Problem is, the box won't load any burned discs. Plays factory games just fine. Will flash off a CDR that has the evox dash and the bios on it (so I know it can read the disc some how).
I changed the bios colors so I know it is loading the bios properly.
I put my thompson drive in it and it works like a charm (CDRs, DVD game backups, etc). No problems at all. Put his Samsung drive in my box and it doesn't load a damn thing.
I read in the archives where a very few people had problems just like this but found no solution.
To reiterate, both boxes work great with all media types using a thompson drive and none of the media types with the samsung.