I also use this to determine the CD/DVD drive letter, and can use it if necessary, but, I'm trying to find something that will automatically pick up the drive letter and path when I navigate to that location and run the install program. I have 10 network drives mapped, and the install program is on several of them (for backup purposes). I might want to start the install program from a specific mapped drive and have it use that drive after the restart. Also, the install program and files/folders might be in different paths (U:\Install or Z:\AutoInstall\Install). Is there a way for a .cmd file to tell where it is located (drive and path) and pass that as a variable? I don't understand the 'for' command, but suspect that might do it. Thanks.