i'm looking to upgrade my memory in my iMac. it currently has 1gb (two 512 cards), but supports 4gb and would like to upgrade to that. we also have a black macbook which has 2gb (two 1gb cards). a fellow mac user that i work with suggested this website: www.macsales.com to purchase memory. would it make sense to purchase the 4gb kit (that comes with two 2gb cards) and take out one of the 1gb cards from the macbook and replace with a new 2gb card (giving it a total of 3gb) and putting the 1gb card from the macbook into the iMac with one of the new 2gb cards giving it a total of 3 gb? could this even be possible? or am i just wishful thinking? is it worth it? or should i just do the 4gb upgrade for the iMac and leave the macbook as is for now? haha sorry if i've confused anyone. thanks in advance for your help!