Those 6 floppies are the same as booting off the xp cd rom.
Do they show up in BIOS? If it just says auto where the drives are press enter on them, the names should show up.
Try using the add new hardware link in control panel. It probably wont work if they aren't in device manager but still worth a try.
Did these drives work on the new motherboard before you installed the virual cd software? If they did then it will only be a software problem.