"But you can have 2x RAID0 with the new F3 samsungs and a separate F1 disk. "
That is not RAID0+1. That is RAID0 and a separate Samsung F1 disk.
Partitioning is something you do when you install windows. You may need RAID drivers before being able to do this. Also, do not use Windows XP; only Vista and Windows 7. XP will not profit much from RAID at all, due to the way it creates partitions. Windows 7 and Vista are fine, however.