Two meteor one router


Behind this great title, here is my problem :
At the moment, our intranet is a huge project with a menu who is routed by iron:router and load the correct template.
I would like to separate my development into separate project. So what we’ve done, is deploying two projects on the same server but on differents ports. So when I call the url :, I attack the first meteor server who had all the existing intranet, and when I call, I attack the futur dev.
The problem, you got it, how can I (and is it possible ?) to got one menu to route sometime on the first deployment and sometime on the second one.

Can I done this maybe with iframe style ?