I have FSX installed and am using ADE. I've used it before but I'm trying to find some airshow crowds to add to an airport. I can't find them in ADE can anyone help me? Thanks

I doubt you'll find any 'crowds'. You have to build your own using single objects.

2 FSX default global libraries have objects that may apply.
In the 'Autogen' library there is an object named 'mediumgrandsand'.
In the 'Animals' library you find few humans, all 3d and several of them are animated.

There are a few addon people libraries available. They, like most addon libraries, are FS2004 libraries. They will work in FSX except that in FSX SP2/Acceleration they suffer from the 'tranparency issue'.