My MacPro 2010 is stuck trying to install Windows. It has an SSD Intel 520 that is its boot drive. It has the factory 1TB drive with the factory OS on it (cloned with super duper that drive OS to the SSD to make the SSD the boot drive. The SSD hangs off the spare DVD drive cabling) It has a 2TB drive with some photo files on it (intended for backup, but not setup yet). There is a Snow Leopard on a USB drive, and a Leopard on a firewire drive (but no suitable cable for the Mac Pros different Firewire connection). The problem: there is a Windows 7 disc in the disck drive; the computer will not VRAM reset, and it boots into the Windows install DVD, but it will not installl onto the 100GB partition that bootcamp just setup. I cannot remove the Windows disc. I cannot engage the expected bootcamp OS choice window by pushing the option key on startup. I cannot zap any RMA via option/command/P/R key selections. I cannot get a OS X start up via the shift key engagement on startup. I tried leaving my finger on the startup button, and the machine did ring tone and restart, but nothing changed. I removed the plugs for the DVD drive - no difference, a bootcamp windows startup commenced, but then hung as no Windows disk was found. I tried disconnecting all the drives and bootiing off the external - but a folder flashed on and off, indicated the OS could be found, but for no apparant reason, it was not being allowed to boot that Snow Leopard OS. I tried just having he 1 GB disk installed, but once again, it went to an early black and white PC start up sequence. On going forward with the Windows install, Windows will not install into the 100GB Bootcamp partition on the 1GB drive. I then allowed it to refort that partition to NTSC, but it made no difference I've tried with just the 1TB drive connected, but the same problem exists. If I could manually remove the Windows disk from the DVD drive, then maybe I could put a snow leopard disk into the drive, and get the mac to boot from it. But ... it would not do that, because the machine is dominated by a crazy Windows install ... but if I disconnected all the drives, then removed the Windows disk (somehow???), then put in the Snow Leopard disk, then perhaps I could command the computer to install from the external USB Snow Leopard system. I fell like putting the MacPro in a full bath and turning it on ... I'd appreciate some advise.