I use on a dual boot
outfit is simply just to create a new partion (gpARTED OR 'Admin/Partition
Editor) either on the working drive or a separate drive, ext3 or ntfs can be
read/written by either OS and the data files/music/pictures are availble to
both. Give the partion a 'title',Gparted should mount the new partition
effortlessly or check the settings under 'Preferences' I The details end up in
/etc/fstab.

Aside, I understand newish PCs with GBts of ram don't actually use mich swap and
flash drives particularly avoid it. Ext4 may be up and coming but earlier OS's
such as 8.04 and BillsOS can't read or write to it.