Hello, thanks for posting on these forums. But if we want to be able to help you there is a few things we need first.
1. Did you look for a solution yourself already? Searching with google, on these boards and in the documentation of MODx.
2. Could you give specific details of what you are trying to accomplish?
3. What did you already try, and why did it not work?
4. Are you aware that we do not give you a ready-made solution? We will of course try to hand out advise, but we won’t do your job for you. (at least not unpaid).