Make sure it's running the latest OS version, "Mavericks"
You should not open a MacBook Air unless you work for Apple. The battery takes up most of the space and is relatively fragile so if you make a mistake its likely that you could start a fire and ruin the whole thing.
Thanks for the link. I think I might just leave the lil mac alone after realizing how finicky it is to take apart. As long as it can handle the software without lag I should just let it be.