I have a main theme - main.org. I have a lot of subsites

I have a main theme - main.org. I have a lot of subsites under that theme: main.org/test1, main.org/test2.

The main theme is a little different from the subthemes in terms of appearance. So I have been using main.org/test1 as a template to copy info (using blog template) to the other sites. No problem there.

I am going to be adding majorly to the menu of my main site. I would also like this menu to populate to all the subsites. I know I can update main.org/test1 and it will populate all the other sites I create. But I don't want to have to update main.org and /test1 every time I have a change.

I have looked around and saw this: http://wpmututorials.com/plugins/networkwide-menu/ but it doesn't seem to work for me (I am using wpmu dixi theme). I also looked at multisite content copier, and that didn't have what I needed.

So, in essence, is there a (relatively easy) way to copy over menus from one site to another (or to point to one menu?)