These files are victory condition pictures for Broken Crescent mod. The files contains all playable factions' in-game long and short campaign condition pictures.
Installation:
Just put the folder in .rar file, into your "C:\" or "D:\Program Files\SEGA\Medieval II Total War" folder and say "Yes" when it ask owerwrite question.
Or you can manually copy the files by drag and droping files in:
"Victory_Condition_Pictures\broken_crescent\data\world\maps\campaign\imperial_campaign\all .tga files" into your own "broken_crescent\data\world\maps\campaign\imperial_campaign" folder.
Some pics:
Long campaign:
Short campaign: