I recently switched my textures to the ones in the sins texture pack 1 . (which are Awesome 4 thumbs up to that mod)
Now my questions , in the textures folder it lists planet volcanic 1 and 2 ,ect for each type
. since i currently have 2 sets for the planets and stars. How would I go about making the game randomly choosing from both sets of textures? Could I somehow change the names to planet volcanic ( 3 ) and somehow tell the game that it has A third and 4th and 5th ect set of textures to choose from when drawing a planet or star.

for example. The free planetarium software Celestia which I have modded substantially. consists of many DDS files for planets stars and asteroids,black holes .ect .to change or add an alternate texture. I would modify the text of its Scc file.
what would i do in these 2 cases for sins

#1 to combine the old, and the new textures for planext and stars together into a larger collection for the game to choose from when creating stellar bodies .

#2 to add files from Celestia . do I , need to alter them in any way if they already are drawing a planet or star ? are they going to need resizing or reworking to work?
is it possible to add multiple choices for sins to choose from when drawing a planet or other bodie. say I wanted 15 different types of ice or volcanic world. (which I have a ton of different textures from celestia I could use)
Sorry for the newbness . I am just attempting some serious modding for the first time on something like a game,
any help or tips would be greatly appreciated
thanks