Hey I have an aluminum Macbook Unibody 13" that I just picked up off craigslist and was wondering if anyone new what I can expand the memory to. It has 2 GB Ram in it right now, and it is the 2.4 GHZ Intel Core 2 Duo processor and 250 GB Hard Drive. Also I am trying to download apple wallpapers for it, but when I set it as my wallpaper it doesn't look as clear on my background as it does in the preview, even when I copy and set the one with higher resolution. I must be doing something wrong, if you don't mind could someone take me through the steps of how to properly download and apply wallpapers, as your background???? Thanks in advance and I appreciate all your help. Thanks.