Au Ra, Horn Change/Scale Colors.
I would love these options for Au'Ra, there are so many things you could/should be able to do!
Not enough memory Excuse:
Simply add an option by skin (or hair, or even hair highlights!) color to make that color also affect scales. That is two textures (one for male and one for female), little to no memory that just turns off the alpha texture for color so your skin color also affects your scales. That way you can make darker/lighter scales.
((Memory added: 2 textures. Woot! That can't be too much.))
Adding Horn Options:
Horns are a lot more aesthetically changing then tail options which you only see some times. I would rather the tail be connected to the horns you choose and the ability to choose horns instead.
((So instead of the ability to change your tail type, you can change your horn type instead. A much better change in my opinion. This would take exactly the same amount of memory since your just removing an option and adding the same thing but different.))
Adding the ability to change horns would give you a LOT more unique of an appearance then tails would.