[c-nsp] Larger scale router rollout tools?

[Garry]

Hi,

we will be required to go through some larger number of router rollout 
soon, I was wondering if there are any tools available to automate this? 
I will building some config template, with the (rather small number of) 
variables filled in by some simple script. I remember some ancient basic 
configs on CE-routers had TFTP download of configs by default, though 
the current ones (876 and the likes) have a basic config that doesn't 
really do much on itself ...

I reckon I will be able to hack something up with expect etc. if nothing 
else suitable exists ...

Tnx, -garry