i have a dell optiplex gx260 and a friend gave me an lg gsa-4163b dvd-rw burner for it (with no software)). of course, being the jackass that i am, assumed that you just open the case, replace the existing drive with the new one, and presto. but jee-whiz was i wrong. the computer doesnt even detect the drive. what steps should i take? do i need drivers? i read something about a jumper set-up, do i need to do that too? somebody, for the love of god, help me!!