My friend has a presario and the model is not really clear. 2300 he believes. Another guy has it and is trying to buy it off of him for only 250 so i told him that that would be senseless lets just get the hard drive replaced and i told him that i could do it. is there any certain ways that the company has made the replacement difficult? So that it must be done by them? I was told that Toshiba and Sony have made it so that there was some chord that could easily be torn if it was not done in a certain way. Aditionally how specific of a hard drive do i need to find, must it be model specific? and also, how hard is it to upgrade the RAM. If you are doing one you mind as well do the other right. I know this sounds like alot but i just really want to help him out. thanks hope to get a repy soon