Vista Home Premium 32 won't boot

My Vista installation didn't startup one day after I installed Quicktax, it would just show the mobo splash screen, the POST info and then would just go black and freeze. It had been slowing down for a week or so then quit after I installed Quicktax. When I tried Safe Mode, it would load half of the files and freeze (on the screen showing the initial files loading). So I put in my full Vista installation disk and repaired a bunch of times to the point where the PC would show the Vista loading screen (the green moving bar), then black, then black with a movable mouse cursor and it would stop there (frozen but the mouse cursor still moved). And Safe Mode would load the files then freeze on a black screen. I loaded my Vista disk and ran the Command Prompt, got to my c:\ and typed in:

bootrec /RebuildBcd

The PC asks if I should add "D:\Old Data\Windows" to the list and I say yes

bootrec /FixMbr
bootrec /FixBoot

and tried repairing again with the Vista disk. Now the PC is saying BOOTMGR is missing and I try typing in the same commands again and the same BOOTMGR is missing. My Vista installation is on C:\Windows so I don't know what this D:\Old Data\Windows is. When I load the Vista disk it now shows that Vista is on (D. Is it actually on D:\ now? Or does that matter?

I really don't want to format cause I have a ton of programs and I haven't exported any of the settings. If I could do that just from plugging in my hard drive to a USB port on my other PC then I would just reformat it, but I'll just loose a lot of programs that I need the settings for.