When you use mount dos, you'll need to edit the tooltips.
There's a FAT95 tooltip that's disabled by default, a "Mount" tooltip that will mount the partitions found. There is also a tooltip for the device and unit. So, for IDE you'll need to write: ide.device as the device and unit 0-3 depending where the drive is plugged in (0 = primary master, 1 = primary slave, 2 - secondary master, 3 - secondary slave).
Steph