Is there a way for global changes yet for templates?

Hey folks,

Looking to find out if there is a way yet to get global changes to a multisite system to all blogs. I have made other systems before using wpmu and have not been able to find a solution other than hard coding a theme with all widget positions and systems so I can change each as its.

Example
I use the plugin new blog system this builds the template and I love this plugin. but then version 2.4 comes out and thats fine for all future blogs but what about all the others that had been created ...Any solutions thanks. if it means building it and you know how than I am for that solution as well. Have money need person...LOL

thanks for your help

Maxx Fairo
venom marketing group
ourcityradio
readybuilt maketing and read built downline