I also have boot.ini that boot a maximum of 10 system by XP. Grub needs about 1/10 of the effort but 10 times more powerfull. For example can you make boot.ini boot 3 Dos and 4 Windows? Grub eats this sort of things for breakfast.
Yes the Grub prompt I mentioned is from a floppy, a CD, in MBR, in any root partition with a system or in an empty partition with Grub on its own inside.
I shall be showing my Grub menu that boot 100+ systems, possibly in a few weeks time.
Yes every one of the 100+ systems can be boot by a Grub prompt.
You can make a Grub floppy by following Chapter 3.1 of the Grub Manual
. The stage1 and stge2 file can come from your Linux. If it uses Lilo only then you can source the stage1 and stage2 from a Linux Live CD. Mepis, Ubnuntu, Puppy and DSL have them.