I've got some memory sticks from a PC system of mine that has (what a surprise) stop working on me. I'd love to transplant it in my Mac and get a bit of a boost. Presently, the memory in my system is: 4 sticks of PC2600 totaling 1.25gb. The two 512mb dims Id like to put in and replace a couple 256ers are PC2100. I should add that one of the sticks installed now is a PC3200 256mb stick from my mac mini. Advice.