Does anyone know how to prepare a character morph to sell?

I would appreicate any help, information, or tutorial that anyone can share that will help me to do this.

the way to do it  is the same as for freebee's
And then the legal txt etc etc...

Is there a tutorial that tells how to prepare the files?

What kind of character morph is it?
If it's dial settings on a Millenium 3 character or Victoria 4, you can distribute a so-called INJ pose file that injects (for M3/SP3/V3) the required delta files, and sets the dial values. For figures that don't depend on injections, you just need a pose file that sets the correct dial values.
If it is a custom morph, created using magnets and/or a modeling program, you'll have to make a "delta pose file" that contains the morph information along with the dial settings.
If the character is for V3/M3, you use my SpawnCharacter script to generate the pose files.

The materials (skin/face textures etc) are easy when you're working with Poser 6 or 7: just save it as a material collection.

It's a dial setting on a Millenium 2 character. Your information helps me alot. Now I know what I have to do. 

Thanks