Oh, you already have the MDLV...
Good, all you need to do is to look at the name of the model. You would then fill in models/modelname.mdl.
You may also want to know that any model that's in the valvemodels folder and has the same name as a model in the .pak file, is used instead of the model in the .pak file. The same goes for 'higher' pak files, e.g. the models in pak1.pak are used instead of the ones with the same names in pak0.pak. Might come in handy...