C'mon, with 76 posts, you know better than to post a thread with a useless title like "Please Help!!!!!", as is explicitly prohibited in our rules.
Also, your sig isn't compliant, either.
As for your question, you can't RAID a single drive. With RAID, you must use drives of identical capacity, or your array will only use the capacity of the smallest drive. (For example, if you make a mirrored array with one 250GB and one 500GB drive, you get 250GB capacity. A striped array with the same drives would have 500GB [2x250GB] capacity, not 750GB.)
I suggest you read up on RAID a little bit more so you can more accurately ask your question, then post a new, properly-titled thread.
tooki