Thanks guys for the replies! I have to admit I only wanted Rex because it was the "must have addon" atleast thats what I saw on youtube. I am sorry for the delay as I have been flying all over the place. I bought REX from fspilot shop and it lets you download 20 times within a year I think I had saw. I ran into a problem with it not loading the weather files but I had to reinstall fsx outside of the programs86 directory, apparently some kind of security measure within windows.
I am going to follow this advice for now because otherwise I dont think I can appreciate the addons if I just assume thats how the game should go! But I did purchase GSX Ground services, I get a real kick out of watching them load the planes.
Another question, and I am sure it bugs you guys too, is when I load up free flight, it always has my plane slightly moving with the parking brakes off. Is there anyway to set it so the brakes are one and not moving??