win xp and 98 =NG for some but not all, Is it 98se, I like se, and I have had 2000pro and xp together/ if 98 is involved you have to load xp last.
The one thing is the file sys differences.
BUT XP,XP is good.
I disagree with some but a single disc with multi partitions is actually a safe choice.
I have 4 OS on one virtual drive:Gaming, Audio,Home,Test.
Home is used for every day family affairs, and test is where all software is tested on and mail,downloads,etc are directed for quarantine and virus scaning. Audio is 5 and change gb with no pretty little shadows or fade effects or for that matter no internet, all but a few drivers enabled, no background services running, Gaming is similiar.
My point is that I have crashed certain partitions and simply reformat that part, usually the test part which is 4 gb free space, no sweat, and I never had to load all the programs on all the parts.
Multi partitions, multi hard drives, multi OS the same or different there is no need to goto the bios to change partitions or OS.
2 ways 1) you can rename each partition or change your boot screen to give you each part and OS loaded, named by you, the amount of time they are shown for what color the letters are etc... inside the control panel. If you want specifics I will provide.
2.) Make an extra partition 500 mb , this is where you put your boot manager.Ditto with specifics but I like 1.