Im going to be waiting here by the door tomorrow until my new imac 21.5 gets here. I got the upgraded i5 processor and normal 4G ram. I bought a 8G RAM kit from Crucial and will install it before starting the computer tomorrow. Should I remove the apple installed RAM and put it in the alternate slots or just stick the 8G set in the alternate slots? New to this stuff so any help would be appreciated. Ive seen the videos online and know its a pretty simple task.