I just bought a refurbished IMAC, and its coming in the mail today. I have 4gb of ram ready to install into it (it is the 3.06 version with 2gb), and i was just wondering if i should boot it up the first time with the ram it comes with, or if i can just go ahead and install the 4gb memory before the first boot up without any software problems (dont know why it would matter, but my lack of knowledge is exactly why im asking)