if you have the J bios, as mine did when i received it. the winchester will be detected fine. i'm not sure about the version revision of the bios... but anyway you still want to flash to the M bios which is the newest and has some cool and quiet fixes for the winchester.
you can still find the bioses on the shuttle ftp, look under Bios/FN95 i think for the shuttle sn95g5. they're in the process of redesigning their site i believe.