There is only one way to create a SFS - to spend some time doing it. You cant just ask for an easy way to create a SFS, because there is no such thing. Of course the SFS itself may not be too complicated, but you still have to go through the tutorial (to learn how to modify the system).

I've learned how to make an SFS by doing Serges SFS-Tutorial (feel free to search for it). It isn't too complicated but nevertheless it needs time.

So start working, or let it be. (Or use the standard FS).