This little mod make game more fast. It allows to train ALL the units in queue in 1 turn (i.e. 9 units x turn), buildings requires 1 turn each, and there is the possibility to train generals in cities and castles.
NOTE: also AI will have this advantages, keeping the balance of the game but fastening it... unless you use other cheats!
Simply unpack the two .txt files in your M2TW/data directory and add "--io.file_first" at the end of the link to medieval.exe