Many events will need to be adjusted, as there are references to "turnIndex" indicating the turn in the year. {11 = December in WIA, but would be Late June for 2 week
turns, etc.]
Many groups are "fixed" for a set number of turns in both Setups and Events, and so this will need to be adjusted by 4x if you go from Monthly to Weekly turns.
Supply generation, consumption and 'carrying capacity' need adjusting for the scenario, using a script command to add to the setup:
http://www.ageod.net/agewiki/SetSupplyMod...and prolly more that I've forgotten!
Benchmark: There is a two-week turn for a small scenario
[1777 Saratoga] included in the game, that took me a week of work to convert! And it is small, with few events!