Would you be talking about a Virtual Drive, this doesn't seem to be what you're describing though. A Virtual Drive makes part of the hard drive seem to be another CD rom drive, as an example you can use it to transfer all info on a game cdrom and then not have to put the cdrom in the drive to use the program. I'm sure it does more but to be honest I've never used it so have very little knowledge of what it can actually be used for, but I would imagine it can do more than what I've suggested. If its something else you require perhaps you could say what your problem is and what you are trying to do. If its more disk space you're requiring then buying a new drive is by far the simplest solution and they are easy to fit and really quite cheap, typically £40 or so for a 80 Gig drive.