Samsung LN-S3251D

I cannot get this to work in an HD resolution. Actually, the only resolution I had output for was what the nvidia install picked, beyond that, I am getting nothing. Everything I pick in the admin portal just gives me the "Out of Range" error. I would really like this too work but I lack the knowledge of modelines and such to figure this out. I have only been able to find the modeline/settings for the PC input which might be what I use till I can get somewhere with this. Thanks for any help that can be given in this matter. I am also using an nvidia 6600GT video card.