UPDATE 1:
I've installed BIU on to my NVMe drive.
NOTE: I don't find it straightforward how you tell it where to install. At first it installed to the wrong (a data) GPT disk. I just:
- uninstalled BIU
- disconnected all GPT disks and my current MBR Windows disk (to be sooper dooper safe)
- then reinstalled BIU - so now it's on the NVMe disk
There is nothing else on the NVMe disk - so it's just a blank BIU menu (as expected)
So now, with a little jiggery pokery in BIOS (I just saved two profiles to switch between - so it's easy) I can boot the BIU (blank) menu or my current working BIBM menu from the (E)MBR disk.
This is great. Now all I need to do is
- copy the Windows partitions over to th eNVMe disk (easy)
- and get them to boot (hopefully with the CHGDTYPE.TBS script, or the FIXBOOT one if that doesn't work)
- I can be free to mess around until it works - because my current partitions are intact - and I can always fall back to using them.
One thing I noticed:
For booting from CDROM, I use the BIBM menu with the "next BIOS device" ticked. This doesn't seem to be available in BIU - but the "direct boot" button lets me pick the CD/DVD drive (both "normal" and UEFI versions work) - so that will be OK.
I'm not going to work on the next part just yet - I've got a few other things to catch up on - but I'll report back when I do.
I *think* I will be setting up two separate EFI directories/entries for the two Windows partitions - and I'll try to label them so it's easy to tell the difference between them.
TBC...