Pistons and editing monsters

[Obliviator27]

1) Turning an object into an entity? I assume you mean entity into an item. You need to have a .tga image for the inventory (not sure on size...small, though), as well as having to set the entity as an item in the model editor under User Defined Settings.
2) Editing the grunt is a matter of creating a particle system and attaching it to his hands, and the music can be changed in the User Defined Settings as well. Be sure to save it as something along the lines of servant_grunt_Whateveryouwanthere.ent so as not to replace your original grunt.