I have never opened up a PC ! Now I am tempted to put in two more modules of 128 RAM. According to Belarc Advisor, I have slots/banks 4(2banks of2); slot Channel A DIMM 128MB and slot channel B DIMM 128MB and slot A DIMM is empty and slot B DIMM is empty. I intend to fill up the empty slots with 128MB each to make a total on 512MB I have a Dell Dimension 4600 and these take RAMs in pairs. Is there a site which describes , step by step, maybe in pictures, how to inset these modules please and what can go wrong ?