Hi,

locate the file of ur M2TW.
open:

My Computer / c: / program files / SEGA / Medieval II Total War / data / world / maps / campaign / costum / e3_campaign_demo / descr_regions.

the first u will see is:

North_America
Miccosukee
england
Native_Rebels
212 198 206
tobacco, coal, america
5
2
religions { catholic 0 orthodox 0 islam 0 pagan 95 heretic 5 }
Inverness_Province

where 2 is base farm value. down at other regions on the same page the value might be higher.

change it in 1 or 0 at all regions. just delete 2 and type 1 or 0.

it will look this way:

North_America
Miccosukee
england
Native_Rebels
212 198 206
tobacco, coal, america
5
0
religions { catholic 0 orthodox 0 islam 0 pagan 95 heretic 5 }
Inverness_Province

do it at all regions with care (sorry if im being annoying ). it will take awhile.

the "save as" on your desktop or a "new file"

after that you open:
My Computer / c: / program files / SEGA / Medieval II Total War / data / world / maps / campaign / imperial campaign.

just drag with your mouse the "descr_regions" over there.

now the pop growth rate will be on zero or even negative, forcing you and the AI to concentrate on building farms to acheive a decent pop growths.

however this will slow down the development in general thus adjusting the time in game is cool and gets u much more turn for gameplay.
if you r interested:
open:
My Computer / c: / program files / SEGA / Medieval II Total War / data / world / maps / campaign / imperial campaign / descr_strat.

the beginning is like:

; Custom campaign script generated by Romans Campaign Map Editor

campaign imperial_campaign
playable
england
france
hre
spain
venice
end
unlockable
sicily
milan
scotland
byzantium
russia
moors
turks
egypt
denmark
portugal
poland
hungary
end
nonplayable
papal_states
aztecs
mongols
timurids
slave
end


start_date 1080 summer
end_date 1530 winter
timescale 2.00

change as following:

start_date 1080 summer
end_date 1630 winter
timescale 1.00
meaning that the game will end in 1630 giving you a more 100 years, and that in place of 2 years / turn you will get 1 year / turn a cool 550 tunrs game

enjoy

ps the above info is not my idea but is from other several mod forums. i play now M2TW with those modifications & the game is more balanced & cool. beside those mods one can mod the strength of factions or diplomatic relations or events ( like in 1 y/t u dont want to get the gun powder discovered in 1150 !!! , but rather 1350 or latter) etc. feel fre to contact for more info. if you already know all the above i appologies.
long live M2TW