Is it possible to use symlinks with mapped domains?

Hello,

Is there a way to use symlinks with mapped domains? Im trying to do the following:

http://www.example1.com/wp-content/uploads/images

links to

http://www.example2.com/wp-content/uploads/images

This way, I can copy all my images to one folder, and use in posts on many domain mapped sites.

Also, is there a limit on how many sites I can use your plugins? I'd like to setup 1000's.. as in 10K or so.

Thanks for the awesome plugins!

Martin Shin