Windows strikes again...
The config:
C: Boot: X-15, 8GB partition, FAT32
D: X-15, 9GB, FAT32
E: Optical
no letter: (hidden/inactive/primary) WD160GB, 8GB, FAT32 (used to back up C:)
F: WD160GB, 70GB, NTFS
G: WD160GB, 70GB, NTFS
Thursday night:
Attach USB2 HD. W2KSP3 detects, loads stuff...