So, without further attempts to reconstruct all of that, here's the short version and the link to the latest copy:
syntax.tcl is a plugin for tkMOO-light that adds MOO-code syntax highlighting to the local editor window. It's extensible, itself, via further plugins for other syntax modules, and has a lightweight MOO-mail syntax flavor as an example. It works fine, but could do with lots of fixes and additions. Feedback always welcome.
Download version 0.1.3.