avtech,
Escient Website
Manuals Section
External Control Protocol Specification
[Link: escient.com]This protocol, per Escient documentation works with either RS-232 or with TCP/IP. The programs we discuss here are TCP/IP.
As far as me supplying any software, my media player is not ready for public consumption as it needs some polish in some areas. Also, it accesses playlists by number so that it can also work with SuperNudelist. I doubt that I'll ever publish that code for public consumption.
Maybe waza04 will publish code and source as I don't have MCE and would like to see how to interface to it.