This is the configuration you'll have to build to summon Big Bertha. (The Block in the middle is a "Mechanical Soul Sand" block)
When selecting a race you will be greeted by this kind of menu.
This is the recipe for the CreRaces Handbook. (b1.8+)
This is how you set up the Runic Altar for it to work and make sure to fill the pillars with fuel! (The fuel used is Lapis Lazuli)
When pressing a "Select" button on the Selection Menu you will open this. This GUI will tell you the bare minimum about the Race in question. (Full information about the races is located in the patchouli book called the "CreRaces Handbook")