http://www.notebookreview.com/default.asp?newsID=2738

well the ram question first
i really not know for sure but:
i dont think you could have more then 2 sticks and only 2gb at max

the ram you use is SO-DIM
you could decide yourself if you want 1xgb or 2x512mb
(i dont know what you have from before)

the processor you can not upgrade