Pagefile will be on your c: drive.
You can move it to the stripe set once created.
Its accessable from -
Right click 'My computer', select 'Properties'
Choose 'Advanced' tab.
Pick 'Performance Options' button.
Choose 'Change' under the Virtual Drive heading
Pick drive ( D: or E: ), set Initial/Max sizes to the same (approx 1.5x your memory)
Click 'Set'
Reboot.
Remember - RAID 0 = you lose 1 drive in array, you lose everything on the array, no redundancy.
If you need redundancy use 2 RAID 0 arrays (2x 2x80GB SATA) and mirror the arrays (RAID 1) that way you have RAID 0+1. You can lose any 2 drives and still have intact data. Drawback is your available storage will only be 160Gb.
Writes are slower than RAID 0 alone, but reads are good as it can read from 4 drives.