OK, it's time to upsize the memory on my laptop to regain some of the performance that Micro$oft has stolen from me... It's a Dell Inspiron 8200, P4 1.6GHz, 256MB RAM, WinXP Home. Is it really as simple as buying another 256MB stick of the appropriate type, dropping it in the slot, rebooting and PRESTO! I've got 512megs of RAM??