this also might help also. ignore it if you find it confusing. basically if you dual boot win98/ ME and win2000/ winxp you should use FAT32 instead of NTFS so win98/ ME will be able to access data. its not neccessary in all situations, but its recommended:
a Redhat Linux installation can only be used on one of its own file systems. If you want XP and 98 I suggest using FAT32 so when you're using 98 you can still read all the data, otherwise if you have XP on its own use NTFS.
also if you want a Linux OS you can get Mandrake Linux and use it on FAT32