Ok, so here I'll keep a log of the RTW mod type stuff I find myself doing...
To start off, this weekend I plan on releasing a small patch for PI. This will include some recruitment fixes, upgraded settlements, minor graphical additions, and possibly a new unit or two with some re-balancing of stats/costs.
Then I'm thinking I might try and create a campaign script for TWOH that would simulate the missions from the original game. It would also make the campaign's year and season (summer) static, because the campaign isn't supposed to be taking place over many years. I also might look into spawning some hero characters/units when certain tasks are completed (i.e. capturing the Dead Mines). So we'll see how this turns out...
I've also obtained permission to use KLA's unit from his European Wars mod. These I will use in CoE (Clash of Empires, my French and Indian War project). Still working on the map for this...