well i'm using win 98, but found this in the drivespace help file hope it helps...
start/progs/accessories/system tools menu
To uncompress a drive
Click the drive you want to uncompress.
On the Drive menu, click Uncompress, and then click Start.
If you have not backed up your files, click Back Up Files, and then follow the instructions on your screen.
Click Uncompress Now.
If prompted to restart your computer, click Yes.
Your floppy disk might not have enough free space to uncompress it by using the Uncompress command. For more information on uncompressing a floppy disk, click Related Topics.