I have a Dell Dimension 8100 with a Liteon DVD player LTD 163, a CD-RW NEC NR780 and a Liteon DVD+/-RW LDW 411S. I can play DVDs on the LTD 163, I have a fully functioning NR780 and I can only see Data and Audio CDs on the 411S. Do I have what I need in my system to decode DVDs because I can watch movies when the disks are in the 163? Is there a way I need to assign a decoder to the 411? Is ther a limitation in Windows XP Pro that I can't have this configuration and expect it to work. Any help is appreciated. Thanks, Joe D.