2 or 3 years ago i help a friend in building a Car Mp3Player , using Winamp 2.xx. Winamp can be controlled by messages; i can't remember now if DDE message or what, and again if with a plugin was needed, anyway it works.
What i don't know is if Celestia can send messages to other programs with scripts, nore if it's possible hacking, subclassing or whatever else Celestia to know when a message between Celestia and WinAmp is needed. But i think implementing WinAmp messages, or even MCI messages in Celestia is a ridicolous task for our great Celestia developers
