Solaris 10 won't evem install here while Mandriva went right on immediately when downloading that for the last build here. That was about two months before Vista was released trying a multiboot with XP Pro/Mandriva/Solaris 10 on the second ide drive there while XP Home sat on the primary host.
Loading stage 2....
GNU GRUB version 0.95 ( xxK lower /
xxK upper memory)
Solaris Operating System - How to Quickly Install the Solaris 10 8/07 OS on x86 Systems
Solaris 10 just like any Linux distro is still a UNIX based OS for the most part. The thing I thought then was it was proprietary only and needed to recognise a SUN chip on the system while questioning the I386 standard reference.
Upon another look I noticed the 10gb minimum requirement for drive space which probably explains why the installation saw a halt. You live and learn I guess!

It's been a few years since I was getting things together and trying out cross platform universal type boot loaders that used different means. boot floppy like the ubuntu boot manager, gui buttons for each OS, Grub, Lilo, etc. then.
Without a dual boot in progress now I will have to wait to see how the work around in the other article goes. I noticed that Vista's restore feature no longer shows a calendar but simply lists points by date rather then choosing a day now. Time to manually create points on your own daily I guess!