They are tied to the facial features, check out this GUIDE!

Yes, absolutely! Just make sure to keep them private.

Yes, as long as you keep the port private you are free to do so.

No, you do not have to purchase a second copy. You can send them whichever file they need (pmp's included).

For the time being I do not take commissions, sorry. If I do end up taking commissions in the future I will announce it on my twitter account.