Help with "multiple level" repositories for a newbie

[Borja Pardo]

Hi all, first of all this is a newbie question, so excuse me if this is not
the correct place to make the question.
We have an idea about version management and i'm not sure if we can perform
it using CVS. I'm also sure it is possible, but i don't know how by now.
We want to have two different levels in repositories. Let me explain: we
want a repository ( a "working copy repository") where every programmer can
perform updates, commits, etc. Then, a project "integrator" checks if
everything is OK with the changes and performs these changes in a second
level (or "main") repository. He is the only one who can make changes in the
last repository. This is to assure things in the main repository are correct
changes.
I'm sure that there has to be a VERY EASY  way to do this, but i don't know
exactly how.
any idea?
thanks
Borja