Ok, so first off let me apologize for the thread necromancy!
I've followed the directions in this thread pretty religiously, but I'm still having some trouble.
This is my system:
AMD X2 5800+ Socket AM2
Biostar TA770 A2+ board
2x1024 PNY RAM (soon to be 4x1024)
ATI Radeon 4870
WD 500GB SATA HD for XP
WD 250GB SATA HD for Vista
WD 80GB PATA HD for misc crap
Phillips DVD burner
XP Pro SP3 was already installed on the 500, and I installed Vista Ultimate 64 on the 250. I could not, however, get the dual boot menu to come up. If I let the computer boot on its own, it'd boot to Vista. If I told it explicitly in BIOS to boot from the 500, it'd come into XP. If I told it to boot from the 250 - where Vista was installed - I'd get a GRUB error. (Odd - I don't have any flavor of Linux installed ... ?) Now, the problem with this is that, every time I'd boot into XP, I'd need to repair the Vista installation with the install CD. (I think the problem, though, was that bootmgr and the boot directory seem to have been installed to the PATA drive, which I found a little ... odd.)
So, following the directions in this thread, I booted up into XP, found the files (NTDETECT, ntldr, boot.ini, bootmgr and the boot directory), put them on the XP C: drive (the 500), and loaded up VBP. (I have 18.104.22.168)
I went to the 'system bootloader' tab, selected Windows Vista Bootloader, Specific Drive - C:, and checked Force, then clicked Install.
I went to'Manage OS Entries,' and verified that Vista was set to the 250 drive (E:, when booting in XP) and added 'Windows XP' to boot from C: (the 500, in XP), then Applied Updates.
Ok, so now I get the bootloader, with my two options. If I select Vista, it works fine. If I go to XP, it restarts the computer. If I use the BIOS to select the XP drive, I still get hte bootloader, because that's the drive it resides on. I'm locked totally out of XP now.
Any suggestions? I'm not ready to give up XP yet ... I'm running Vista without entering the license key, to see if I want to keep it or not. If not, then I can still transfer my copy to someone else and not take (so much of) a financial loss on it ...