Oh - and if i have 4 slots (and i know i have two 512's in there) can i just put in the new 1gig cards to make my system 3gig... or do they all have to be the same memory type?  (i know 2gig per program was mentioned, but if i can get it so windows runs off the 1gig pair, and photoshop of the two gigs, i get more space then )

Oh, and thanks for the help guys this is great

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography