|It sounds like the original hard drive has died and the replacement drive may not be compatible. I couldn't find much on your brand. First you need to sort out the hard drive issue. Then you can move on to the operating system issue.|
Could be something MORE than just the hard drive but it doesn't sound like it. If you can boot to the Vista DVD and it is attempting to install it sounds like a hard drive problem.
You can only run your Vista on ONE computer.
Contact the manufacturer (Phillips?) of your desktop computer and request a set of recovery disks. You may need to pay for them, if available at all.
Otherwise you need to BUY a retail version WinXP/Vista and use it to install.