i have this computer i want to add some ram to. I guess some pc's can only handle so much, im not sure. It has 256mb ddr ram and i want to make it 512. the computer memory bank says this.....Installed: 256MB/pc2100 Memory bank 1: 256 DDR SDRAM Memory bank 2: none.....now i want to know if and how much can i add to this...thanks