veiwer

when ever i try and open a playable model,chareter is says hlmv has caused an illegal error and close but will open all other model e.g trees namek house dbs

Ok I wanna try Skin editing on the esf models. I have photoshop, and Half life model viewer and I went into half life model veiwer and opened trunks. How do I skin it now? ((Anyone got any tutorials?))