I have been searching for the same answer, i want to put the aether in one pack all by itself so that i don't have to rewrite my minecraft.jar and ruin my other mods. I thought the aether was like an entire other program but realized it was a mod. It is also not really updated, I noticed that some of the minecraft versions in the technic pack were different so i thought that with this new custom pack thing i could download it on the right version and play the aether. I've never played the aether and want to try it but if there is any problem that prevents me from downloading on to technic its really not worth the hassle, thanks for any helpful answers.