So, has anyone replaced both modules with new memory? I'm going to buy my memory from crucial as per recommendation But I've heard alot about memory not working in both and I really want to keep my price as low as possible when purchasing my computer. So I considered buying just 512 in 1 module. The thing is, what if replacing both doesn't work? Then I'm stuck with a 512 and 2 gig stick together. So, has anyone had luck replacing them both? Also, since they recommend 1gig for vista should I just get that instead?... I'm really wondering if I should risk it.