I do :bigsmile: Look underneath your laptop, you should see two sections, Open up both and see which one has the ram card in. Its dead easy to upgrade, The ram cards you get come with a little instruction paper showing you how to do it anyway. I got 2 512mb ram cards from kingston, and that was about Â£130. Or you could go to http://www.kingston.com/. Do a search for what ram you need by enter the model number etc. Check the maximum amount of ram you need, and what type you need, whether its 266mhz ram or 333mhz, then just choose. It might say something like, 'your laptop can take 333mhz ram but will only run at 266', which is fine, just get whichever is cheapest i;d say, thats what i did.
As for how to pair your ram cards up, this is what my pairing this looks like at kingston:
So basicly yeah, you need another 256 ram card, OR you must get two 512 mb cards, or one 1gig card, which means you have a slot for a second 1gig card later on if you need to upgrade again. Basicly, you cant get 1 gig ram by keeping the 256 ram card you have. Either get a second 256 and stick with 512 ram, get two 512's or one 1gig. hope that helps.