How to best handle three offices with three different sets of repositories and different proxies?

[Rainer M Krug]

Hi

I am working at two different offices in which I have to use different 
proxy settings and different repositories.
Up to now, I just changed the proxy settinges in the config file with a 
batch file and started smart as usual, but this does not work for the 
different repositories. I thought that I could use differfent config 
files and then by using the --config-file option select the appropriate 
config file. But I guess, that the repository addresses are not stored 
in the config file - what is the best way of handling this situation? 
Define all repositories and then just enabling the ones relevant to the 
sit I am at (and would that be stored in the config file?)? Or do I have 
to use different config directories? The repositories are the same - 
they are just different mirrors. Could I use the mirror optionthen?

Any ideas welcome,

Rainer