Looking to run XP, 2000, 98se and linux on one box

i know that you should install the olderst OS first when it comes to dual booting Windows OSs, but are there any extra precuations i should go with when adding linux into the mix?

My Current plans are to FDisk my 40 gig into equal 10 gig partitions and install each OS on its own partition.

I am hoping to use as little third party software as possible to make thing simpler when it comes to destroy each and start clean again.

Any help would be do me some good
MD