Sony DVD-ROM DDU1615S Driver

Seasons Greetings everyone!!

A very good friend of mine had  bought a new comp from Dell a few months back and was nice enough to give me his old Dimension C521. He also gave me the reinstalation disks. Problem is.....THE DVD-ROM DRIVER IS NOT WORKING!!! I phoned up Dell but they want me to pay $69.95 for a driver. Can anyone help me with a link for a free compatable driver for my Sony DVD-ROM DDU1515S drive? It is a 16x SATA Disc Drive. I have found several drivers that match my CD Drive but none will work for it is the whole "Dell Only Drivers" thing that is buggering me up. So if anyone can link me a place for the driver I need for FREE. That would be great. Or if anyone knows a link that I can download a "FULL WORKING COPY" of Driver Detective to do it for me. (Wink wink nudge nudge if you know what I mean. I barely make enough money to pay my ISP. So this is my other main problem. I need a driver fix and I have no money. Gotta love the Christmas holidays.) I really need to reinstall windows XP as this computer was sitting in my friends closet collecting defrag dust bunnies. But I can't get the DVD rom online. It opens, it closes. The green light blinks a couple o times and then just stops. I get driver error messages. And also when I click on "My Computer" Icon the cd drive icon does not appear there. PLEASE HELP ME!! I know how to do all the rest of what I need to bring this computer back to the speed it should be. I just need a Driver for my Sony DVD-ROM DDU1615S to do it. Its a 16x SATA (Thats almost French to me.)