I think I was seeing that when first trying it with Vista on the ide and XP on the first sata once XP was able to be added into the Vista boot loader. Both versions seeing a second copy of Vista on the second sata drive with XP being the one on the second partition saw the boot.ini.hns version with XP seeing the boot.ini too. The idea there is to still run Vista isolated from XP as a stand alone on the first drive while trying the dual boot on the second sata model when booting from that.
For some reason XP wasn't automatically added into Vista's own loader when the newer version whent on last. Any other time Vista would jumped all over an earlier version seeing it as an option. The boot files were also missing as well before HnS went on. First the recovery console to see XP loading again followed by booting with the Vista disk for the repair option again knocked XP out. Fortunately I saved copies of the boot files in a separate folder and copied them back to the root of D for XP to load again.
I most likely set XP as default assuming I could change that once in Windows. The effort to use HnS on XP would simply be to raise the 0 seconds up high enough to allow choosing Vista or XP as the default while softwares and drivers are being installed. For going back and forth between drives that's easy enough with the F8 boot menu seen on the board here. Others board obviously see F12 or even F1 for that if available.
The main idea is to always have a working host drive in some sense while trying out dual and multiple OSs on a second drive. A third large capacity drive will be a means of safe keeping files for both and other versions/OSs despite what goes on on the second one or if problems are seen on the first.
The HnS tool is an opportunity to work with that as well as seeing how the HnS turns out in the long run. If I can't get the time raised back up for Vista to load then I'll probably end up reinstalling the new version over again for the fresh attempt unless you can manually edit the menu.lst or boot.ini.hns and see that change made being a G4D entry into the mbr there.
UPDATE:
Upon booting with the Vista disk the Install Now actually rejected that! But the startup repair to see if Vista would load after using HnS in XP saw some interesting results.
The one thing however that is missed about XP is the restart button.
Compare that to the awkwardness of Vista's.
The reboot into XP still saw the XP primary by itself since the other sata drive wasn't plugged back in but now can apparently. 1.7.1 saw the bogus entries removed with the boot time down to only 2 seconds while the G4D prompt now will be lowered a little from the default 30 seconds. Now to see what goes on when the other drive is plugged back in and visible to XP while not linked by mbrs.