Open the data folder (C:\Program Files\Microsoft Games\Age of Empires III Trial\data) and then open the file techtree.xml in a text based editor. I recommend jEdit.
Once your in the file you will see things like ...
< Simply change the values after "amount" such as ... and now you have a great coat that strengthens your unit by 340% and it only costs 5 in food and takes about 2 seconds to research. so Lower food, wood, gold and research levels are better, be careful with the amounts though because i was messing around with them and some like cost of things, are in percentage and if you make them more it will cost you 10x more to buy wood at the market instead of 10% as much. hope this helps some of you guys. I am working on making it only work for one CIV. Right now those damn spanyards kicked my ass because they got a shipment of 100 pikeman before i had my city built. it makes the game interesting to say the least. you should probably change your minimum map size to 500m first. Have FUN!
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