geoset merging help

geoset merging help

i have oinkerwinkle's geoset merger but i dont know how to use it can anyone help me by giving instructions?

EDIT: ok ive leanred how to use them with oinkerwinkle's tutorials but i cannot seem to get the model to work. im trying to make the beta far seer(mounted wyvern) but i cant check it in wc3 viewer because it crashes. it also doesnt work in game.

You probably screwed up when you edited the .mdl file.