OK CG, I have some good news. I went on the premise that somehow the SP1 pack screwed around with the boot stuff somehow, maybe knocking it around so that my original Vista HnS could not locate what it needed to to boot, or that the SP1 screwed up the XP boot, again I don't know. But what I do know is this:
1. I reinstalled XP, and re-followed the wiki article on setting up a dual boot. I checked and
at this point I could boot into both OS's. (I did have problems booting into XP, was
getting errors like "hal.dll missing or corrupt" which could be a boot.ini problem.)
2. I then deleted all HnS files eg, bootmgr.hns, etc. from both Vista and XP partitions.
3. I then ran the original build of the Vista HnS that I had, hiding the Vista files and setting
the time out.
4. I rebooted and Vista HnS worked, loading the original screen (which I assume is the
GRLDR?) and giving me the option of which OS to boot into. (Easy BCD being set to 0)
This is what leads me to suspect that the original problem was something with XP, that when this was fixed, there might have been remnants of HnS files that were getting in the way as per the stages thing you explained to me - that "X" factor that was off or something, so that I had to take all the files out so that Vista HnS was truly starting from scratch.
I have attached the install logs from the newest build and the one I just did with the older build so you can check them out. (Vista HnS Beta is the earlier build) If you want, I can do the same thing (step 2 & 3 above) for the newest build to see if that works for me, waiting for your word on this.
Saphire