Sorry, I see your image shows 1 mb RAM, not two.
I recommend you get good, reliable RAM based on company reputation, not on price. Most likely you have two 512 mb SODIMMS in there, you'll need to get two 1 mb SODIMMs and pitch the 512's. Look at Crucial.com for a selector to find the right RAM for your model. OWC tends to be a little cheaper, but Crucial is very reliable. I've built many PC's over the years, lots of Crucial RAM with never a problem.