All the files to use it are in the folder just put it in the units folder and add it with civ edit ..... oh I dont have the pediaicons in there..... Im sure Shady would make some
http://www.civfanatics.net/uploads4/Native_american_Horse_Archer.zip
and a preview
http://www.civfanatics.net/uploads4/AIHorseArcherAttackA.gif
http://www.civfanatics.net/uploads4/Native_american_Horse_Archer.zip
and a preview
http://www.civfanatics.net/uploads4/AIHorseArcherAttackA.gif