Hello everyone this is my first post ever and i just downloaded a unit graphic but how to i put it into my game if you were wondering i downloaded the ghost one. Im in the Civ 4 folder now but i dont see anywhere to put the files thanks in advance.

With most mods all you need to do is unzip them into the:
C:\Program Files\Firaxis Games\Sid Meier's Civilization 4\Mods
Directory

Then, when you load the game, just go into the advanced menu and click "Load a Mod"

welcome to civ fanatics!