hey i just finished installing my Xecuter 2.6 CE and flashing the bios with the lastest bios. i then poped in my Dashboard cd and it booted well (Auto installer Delux 2.11) i followed all the instructions and i installed Avalaunch on my E drive (retail) and there were no errors. after it finished i restarted my xbox with no cd inside, and i still got the M$ dashboard. ive tried installed other dashboards and they wont boot.
I had that problem to, u gotta install the dashboard u want to use to ur C drive as he said, in fact i would also recomend (if u have a bigger HDD) tell it to copy everything over to ur hard drive.