I will be happy to see your results 
For anyone willing to use this: you will most certainly want to use it with GPU particles, as you want to simulate as many stars as possible. However, a GPU emitter can NOT create particles with different starting colors, so once you found a nice pattern, you have to duplicate the emitter to create a new one with different particle colors.
If you wonder how I created the nebula: I took the volumetric clouds from the content examples folder and made them blue.
Also, I was really surprised how easy it was to add a new particle editor module, great work there EPIC!