1: Neph is working on bugfixing/updating as we speak. seeing as he is mostly a 1 man crew, it will take time
2: you can mod the games files in
Medieval II Total War\mods\Hyrule\data\world\maps\campaign\imperial_campaign
here you go to the file descr_strat.txt and you can edit Trade values, faction starting money amount, among other things. you can change the economy the way you want. however, back up any files you want to change. If you mess up, you can pretty much break the whole game. (And there is a sub mod in progress, here
If you have any other questions, ask and ill answer them if i can