HELP!!! Adding my computer to my home theater.....Maybe

I have a Mitsubishi HD1080, Model# WS 55805 with a db15 connection and I'm not sure what configuration is needed to hook up to my pc running windows vista and a Nvidia GeForce 6150 LE video card. I have ordered a db15 male to male cable that my pc accepts but I'm wondering what else needs to be done. Can someone...anyone out there give me an idea. I have read something about frying the tv if the frequencies are not set correctly. Any help will be accepted with open arms. also I do not have the user manual and the tv was bought in 2003. Thanks before hand