You might use a preloaded doll (CR2 of skeleton & outfit & flames), with every part of the skeleton below the chest and collar bones un-ticked for visibility.  As far as I know, as long as you don't distribute the geometry or textures of the skeleton -your CR2 would reference them, but not provide them- you're OK. 

     Because the flames reach down into the chest, it occurred to me that we need to deal with posing.  I made conforming flames, but because the shader is sensitive to mesh shape -which changes with a pose- this morning I am experimenting with separate overlapping parented props.  Once this is done to my satisfaction, I'll send you a zip.

     I noticed an error in the origin of the Ryan skeleton jaw;  it was left with the default geometric centroid position, so that it doesn't open properly.  Use the joint editor to adjust Z offset 0.004 and Y offset 0.663 so that it will hinge realistically.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5