Raid 0 - i want it - i need it - so... i got 2 WD 40 GB harddrives. yes, they are the same

I got a Gigabyte mobo with onboard raid, and the drivers here on a cd.
a quesitons since this is me first raid array
can i : partition the harddrives to say 20/20/20/20gb and just use the two master partitions for the raid array and use the other two fro storage, cuz, if this goes bad or dies, i have Important files

that i prefer not to lose, so someone told me that if i partition the two drives evenly, raid will still work and that i wont lose any of the data in the two non striped arrays if something goes rong and i gotta reformat.
second, when setting up a raid array, can i use the drivers off the CD ROM or do i gotta get them onta a floppy... and put a floppy drive in me computer.??
thanks for the hlep all
Stupid people do stupid things, smart people outsmart each other, then themselves.