I've just brought (in the last 7 days) a early 2008 refurb whitebook from the apple store. Its the basic model which came with 1 GB RAM. I've tried to install 2 x 2gb in the macbook today but i'm unable to get one of the RAM sticks in. I've made sure its gone in the right way and pushed really hard but i still cant get it to go in. I did notice that on both of the sticks that i took out there was a white substance on the gold contacts which i 'think' may be some sort of lubricant. So what do I do now? I would like to get this machine up to 4GB and have only had it 7 days. I don't particularly want to send it back because its in really good condition for a refurb. Any ideas?