Manage multiple instances of a single application

[Achim Domma]

Hi,

I have an application which is hosted for example on http://domain/app1
with it's configuration in web.config. Now I would host multiple
instances of this application i.e. http://domain/app2, http://domain/app3,
.... which differ only in web.config settings.

Obviously I could duplicated the folders and change web.config, but
this would be a problem when updating the application.

Is there some kind of best practice for managing such an scenario?

regards,
Achim