Well, I see you are using redhat. In version 9.0, what you should do is boot directly off of the cdrom drive (with instalation disk 1 in) and get into the setup program, answer a few layers of questions, then do a manual partitioning.
You need:
/boot firstpartition (hda1) ~60 megs (may be a little high, gives some expansion room, redhat may complain it is small, ignore em)
swap secondpartition (hda2) ~512 megs (at least as big as your physical memory size...if you have a 40 gig drive, 512-700 is a good range for this to be in)
/ third partition (hda3) ~whatever is left (this is where all that data ends up going.
the /boot partition and the / partition both should be ext3 partitions (this gives journaling support which means less fscking later (equivilant of window's scandisk))
the swap partition should be of the type swap.... makes sense, don't it
And, I think thats all you need to do, go on with the install normally past that.
-Chris