As cdimage is in your DVDroot, you could use it without driveletter. Maybe you have to check, if the WXPPC.bin is in the root aswell, otherwise adjust the path to it. \cdimage.exe -lWXPPC_EN -t08/23/2001,09:00:00 -b\WXPPC.bin -h -n -o -m \ROOT\XPPC C:\WXPPC_EN.iso You should have enough space at C:\ to create the ISO, ofcourse...