We are going to create a placeable mod from scratch.
Here is the mod we made.

Software needed: All Free - google them
Blender 2.79
Paint.net
Notepad++
Giant's Editor 8.1.0

First I'm going to show off the mod I made for Spencer TV and then we will watch about 3 minutes of high speed blender creation. Once the Music Stops I will start to bust in to texturing and talking you through it. Then we will import it into giants editor 8.1 beta.
And to finish it off using notepad plus plus.

Let me know in the comments below any questions you have about this tutorial