Was looking through the Crucial website for 1GB RAM for AlPbooks and it lists differing compatible modules for the 1.33 15" and 1.67 15"...would anybody know why this would be? Only asking as there is a price difference between the two of US$12, not much sure but noticeable...and I thought that both machines would be able to share the same types of RAM. For 1.33, it lists module part no. CT368646 (http://www.crucial.com/store/MParts...ok+G4+1.33GHz+(15-inch+Display)&WSPN=CT368646) while for 1.67 it shows CT434058 (http://www.crucial.com/store/MParts...ok+G4+1.67GHz+(15-inch+Display)&WSPN=CT434058), which is the cheaper out of the two. Thanks in advance for your 2 cents'