Please move as needed. I have two HP desktops a DC6000 and DC7900 from their BUSINESS line. The OS installation process consists of a 2 CD set, RESTORE and OS. The restore CD is model specific. The 7900 came with this set, the 6000 did not. The 8000 from their ELITE line is apparent ly the same unit except for the fact that physicaly it is a mirror image, that is the BUSINESS MB is mounted inside the LEFT while the ELITE is mounted inside the RIGHT as viewed from the front. Is the restore/OS set from the ELITE 8000 the same as the DC7900? What is the ELITE model equal to the DC6000? Would the cd set also be the same? Any help welcome.