My girlfriend is buying a refurb'd 1Ghz ibook. It looks like it will only come with 256MB of RAM. For an extra $75 apple will bump that up to 512. I was looking around and it looks like for $30 I can buy from crucial and get it up to 512 or for an extra $115 I can go up to 768MB. What I'm wondering is how easy is this to do. I'm pretty good with hardware so I am not too worried about this part but just want to find out ahead of time. Someone told me that the first 256MB is not removeable, is that true? If I upgrade the ram myself with something other than what apple is trying to sell me how does this effect the apple care plan which she is also going to get? I'm guessing if we ever had to send it back or have it looked at I could just remove the added stick of ram and they wouldn't ever have to know.