HELP !!

I do not know if I am doing this right so if not I am sorry.. however I need help with an issue and have been able to find no help so this is rather my last resort...

I have an Inspiron 510m I love it and I just got a new hard drive ( the drive is of course IDE) but.. I need new updated Dell drivers for the bios so that it will take the drive as it is over the 80gig and at the time I was told it would be fine by the sales person now my old hard drive is dead and I am stuck with a laptop that doesnt work and with no help from anyone Dell tech support wouldnt even take an email.. I need the laptop for work.... can anyone help me ??? please...