I recently purchased 2x 1gb sticks of Crucial RAM. The upgrade was based on the fact that my 2.0ghz blackbook was not running CS 3 very well at all with the 1gb of ram that it had in it. Since the upgrade, my macbook has been running much better, so much better in fact that I would like to bump up to 3gb now. My question is this: Currently, Crucial does not offer 2gb sticks of ram for the macbook ports, but Samsung, OWC, and some others do. If I were to buy a 2gb stick of OWC ram and pair it with one of my current sticks of Crucial 1gb ram, would that be ok? Can I pair two sticks of the same type of Ram from different manufacturers? Thanks!