John Chin wrote: > I also designate a CD-ROM drive letter well beyond the letter of > the last possible Hard Drive expected in a system. With a DOS > system the more drives you provide for (LASTDRIVE= . . .), the > less conventional/UMA Memory you have, so be prudent. There's no > free lunch. John, what commands do I use to designate the drive letter for an installed CD-ROM? I currently have LASTDRIVE=Z. I would like to change this to a lower letter and then designate my CD-ROM drive as the same letter designated by the LASTDRIVE command. I'm currently showing 575 K in lower memory. If I could save some lower memory by changing the drive letter designations it might make it easier for some progams that hog lower memory to run. Loy