@rik209
They don't look too different to me I suppose, the only real difference is the OoT Lizalfos have a more narrow snout, more fingers, and a longer tongue I suppose. I'll figure out something.
@VGF254
'Civilized' Lizalfos basically have metallic armor and outfits rather then the more barbaric and tribal outfits, much like the Dinalfos and Lizalfos found inside the Temple of Time in TP.
@Kimmolito
If I were to make a guess my theory is that you might not have installed it in Medieval 2's Mod Folder. I presume you had Medieval 2 and the Kingdoms Expansion Pack installed beforehand?