how to do this?

[Mike]

I need some help. I have an application that is running 3
environments. I want to have a single cvs tree that
supports the 3 environments. The source moves from one
environment to the next using tags. I don't know how to
create the environment. I know I can use the 'cvs co -d env os/app'
to checkout the source, but is there a reverse to build?

I have something like:

/os/app
       /dev
           /test
           /prod

The source is the same in the environments, just at different
stages of development. I want to store the source in a tree like:

/os/app

Suggestions on how to do this?

Mike