Publishing only some builds

I want to be able to configure Cruise Control to do the following:

1. Run CI build during the day and e-mail results to developers
2. At a specific time in the evening, stop all CI builds and run a nightly build.  E-mail the results to developers and management.  Publish the build artifacts to a file server
3. When necessary, on demand be able to follow the same procedure of the nightly build at some time during the day

I’d like to be able to do this for several branches of our source tree.

What is the best way of going about this?  If I want different publishing semantics for the CI and nightly builds, do I need to create two different projects?  If not, how would I achieve the desired publishing semantics?  Also, how do I go about stopping the CI build to start the nightly build?  And, on a related note, if I want to have a nightly build for two different braches, how do I set it up so all CI builds are stopped and then the two branches are built in succession?

Thank you for your help!

Scott