i have renamed it to bios.bin and dummy.bin (dummy file did not need to be renamed) and used a cd-rw. it detects the disc, displays the disc label, detects the bios and displays its label, give sme the flashing xecuter screen and the warning, then it just stays there on that screen, the led on the front flashes amber/green. left it alone for a while, thought it might be a time thing, nothing. when i went to turn it off, after i hit the button but before the screen went black, it said "erase failed" at the bottom of the screen. i know my protects are set right, and have set the bank switches every way mentioned earlier in the thread.