Dv3510nr

I have a HP dv3510nr, and I installed the Ubuntu 9.04 with dualboot with my Windows Vista (64), and since the begining the audio has never worked. I researched my different sources to find out a solution for this issue, but I couldn't fix it. I even download at the NVidia webpage the "solution" for the GForce 9300M, which is installed in my notebook, but I couldn't understand how to run it on my computer. Resuming, I'm not a high end hacker, and I can't fix this easily, it seems to be something for "professional" users. I don't want to give up to use Linux, because Windows is pissing me off. Is there anybody that can help me to solve it?