[SOLVED] Global changes for network

Hi,
I am using ATO 3.5.3 on WP 3.0. I installed a network, and ATO 3.5.3 in all the sub-directories. Is there a way to make global changes to all directories without having to go back and forth between them? In some sites I do want some differences, but the "general" look I would like the same in all.

So, is there a way to do both (make global changes and individual changes)?

Thanks!
Dona