Dunno for sure, but I was under the impression that that didn't matter any longer.
As far as I am aware, you should be able to "bung" the install disc in, and tell it where you want the install to go - don't forget the nonclamenture is different.
5 partitions presumes that linux will see the "C" drive as hda, the "D" drive as hdb and so on, so I should think that you would want to install onto hdc or hdd though if like me you have a dvd drive, the linux install might want to call that hdf (although my install labels is cdrom on the desktop - if I want to do anything with it I have to refer to it as hdb.
Erm, also if the 5 partitions are on the same drive, it might want to call the "C" drive hda1, the "D" drive hda2 and so on - you would have to remember the partition sizes and see what the distro install comes up with.
hope this is of some assistance ?
p.s. you could try looking here
and see if they can point you in the right direction - though it could turn into a mammoth reading session.