Adding Units to Stacks

Just pick a city or any unit as if moving it and just open console and simple type george or any of those on this list and hit enter to get the following units
Code .................................... Effect
rogan ................................... Elephant Artillery
vindaloo ................................ Elephant Rocketeer
madras .................................. Elephants
istanbul ................................ Mercenary Monster Bombard
george .................................. Mercenary Monster Ribault
houston ................................. Mercenary Rocket Launcher

Console codes

Press the tilde (~) key and enter these codes to use them. All codes are case sensitive. Make sure to capitalize family member names, settlement names, and anything else that needs capitalizing or else it will not work.
Code .................................... Effect
character_reset ......................... Allows a character to move again. Does not always work
add_population "settlement name" "amount" Allows you to give a city more population automatically.
give_trait "character" "trait" "level number" Allows you to give any trait your faction can have to a specific general.
process_cq "settlement name" ............ Anything in the city's building queue will be built automatically.
add_money "amount" ...................... Gives you the specific amount of gold.
show_cursorstat ......................... Shows coordinates under mousecursor in format x,y
toggle_fow .............................. Toggles on or off the fog of war. You can see the whole world map when inputted.
auto_win "attacker/defender" ............ When at the battle scroll, input this code in, attacker if attacking, defender if defending and press auto retaliate button. Automatically wins.
move_character z x,y .................... z=name of settlement or unit without title (except Captain). x,y=coords

Create a Unit

Use the console to enter the following

create_unit "settlement or character" "unit ID" "amount (1-5)" "experience (1-9)" "armor (1-3)" "weapon (1-3)"

Example -

creat_unit "London" Longbowmen 2 9 3 3

^The above code will create 2 units of Longbowmen in London with 3 Gold Chevrons, Level 3 armor and Level 3 weapon
Code .................................... Effect
create_unit "settlement or character" "unit ID" "amount (1-5)" "experience (1-9)" "armor (1-3)" "weapon (1-3)" Creates Unit at any settlement/general you like

Unlockables
Unlock all factions

Find this directory:
Medieval II Total War\data\world\maps\campaign\imperial_campaign

Then find the file descr_strat. Open it with a text editor (Word, or somthing like that). Cut and Paste the 'unlockable' section into the 'playable' section and save the file. Launch the game and you should have every faction available.

You can also unlock the Papal Estates, but not the Mongols, Timurids and The Aztecs.

Remember to make BACKUPS before you are editing the game files!!!!