hi i was plannig to buy and upgade my memory to 2GB ram but i am stuck i dont now what type of memory i can buy or need to buy plss can some one help me it would be great and tell if can buy any of these memory cards:(i phrefere to buy the seconde pair becase ist cheaper only 30 pounds http://cgi.ebay.co.uk/2GB-PC3200-DDR-Memory-RAM-DDR400-400-MHz-2