Why don't you pull out a flashlight, pull off the side of the case, write down the numbers you see printed on stickers attached to the board and google those numbers.. it's how I found the make/model of every pre-built PC's mobo that I've worked on
Ok... Basically what is happening is that this is my Grandpa's PC. He got it with only a CD-ROM drive, but now he is whishing that he had gotten a CD-RW drive, and I offered to help him with it, but I dont know which CD-RW will be compatible with it because I havent worked on a PC like his before.
It tells you on the page i gave you a link to. Nvm, all you need to know is that it has an IDE slot and StrangeHold has given you a nice list you can choose from.