How VS model creator works

[Oskolok_]

I'm very confused while dealing with this. For example, if I use vanilla textures, should I just put the model in the game, or manipulate the code to make the model display correctly? Or, if I'm using my own textures, should I do something other than use Entity mode to save the UV map correctly, since it only preserves the bare texture as if it wasn't there. It would be good to know the details, as there is very little material other than the wiki.