I have managed to do this, it has taken a little bit of work but I think it was actually fairly easy. I have even managed to create a scene similar to the one featured in my Level Editor Demo's:
- Transform Component
- Mesh Component
- Render System
All these entities are currently hard coded into the program as I will need to re-write all of the Entity Parsing code. The Asset parsing can remain as it was i.e. Loading Meshes, Textures, Sounds as that is no different and is already implemented in this. It will just be the specific Entity Parsing and Creation code that will need changing, this will hopefully not take too long so I can get the Level Editor in a stable state with the new ECS fairly soon.
I'm really impressed with how smooth things are going at the moment, I hope It stays this way.