Upgrading dell 600m laptop

[ANY2CARDZ]

Im not even sure if this is possible, but I would like to upgrade my laptop. Right now its 1.5ghz centrino with 512 Ram, and a 60gig hard drive. When Im running all my applications for poker it can freeze up and get pretty slow, I was hoping that just upgrading the Ram to 1024 might do the trick? Can this be done on dells, and will just upgrading RAM alone do the trick? If this can be done what would be the best way to go about it?