yeah its been asked thousands of times, use the search function on this site to look up answers.
but here's what i know,
each partition can be a totaly different File system, so u can have ur NTFS for windows, and ur EXT3 for linux, (is that what u were asking)
Ohh, and in redhat 9, using the auto-partition on installing it made 3 partitions...
a boot partition (100 megs, but im currently only using 10% of that)
a swap partition (defaults to double the amount of physical ram 500 meg for me)
and the main partition, how big u want it ? i would recomend minimum of 6 gig, 2 gig for linux + software. and a few more gig for games / whatever.