This is an urgent project and you must know PHP and understand Joomla.
Using MetaMod Pro (which allows for enhanced conditional values to display modules).
Link to the forum post discussing this: [url removed, login to view]
The goal: If Article ID = 'XXX', and Module 'AAA' has output, show 'AAA' otherwise, show 'CCC' else if Article ID = 'ZZZ', and module 'BBB' has output, show 'BBB' otherwise, show 'CCC'
I hope this makes sense - I can explain in more detail in PM if necessary, but reading that forum post should help make it clear.