Setup has the ability to create a highly optimized CD-ROM driver. Setup can run a utility called ADLINKW.EXE that will create a driver configured specifically for your system and SCSI devices. It will be slightly smaller and faster than the existing driver, but will only work with your exisitng configuration. If you change the SCSI ID of your CDrom or add new CDroms, you will have to run ADLINKW.EXE yourself to make the CDrom driver aware of the changes. Yes - create a new CDrom driver No - use existing driver and continue with Setup. Suggestion - choose NO. The existing driver is more versatile and you can always use ADLINKW at a later date to change the existing driver.