I got a reply from Ian today, which I thought I'd share with you

Hi Harm,

Sorry about the delay in response but, as you guessed, it's really rather busy around here at the moment! :)

Anyway, I did send your questions over to the Aussies but they're just too flat out to find the time to answer the questions, I'm afraid. However, I believe there is going to be something about modding on totalwar.com very soon - and I'll chase the Aussies up as soon as the game has gone gold to answer your questions in full.

Please feel free to chase me up on this regularly - as I'd be liable to forget otherwise! :)

Speak to you soon,

Cheers,

Ian

I think that's good news; they are working hard on the game and we'll soon get a few answers. :)