Well this thread shows you where you can get 12v power from: (READ THE WHOLE THING)
https://www.acidmods.com/forum/index.php?topic=24655.0You can hook all you LEDs up to that. Amongst other things but don't go over board you could get banned. For fans I would by a talismoon whisper fan with LEDs and swap it with the original one, thats simple just unplug it and plug in the new one. Here's what they look like:
http://www.themodshop.com/media/SFIMG0000313.gifYou can also get in green and probably other colors. Making it silent I wouldn't know how to do, maybe get better rubber feet to get rid of the vibrations better and for cooling..the talismoon whisper fans move 58% more air than the original, and are also 7% quieter....lol well there's a thing for silent mod.
Try the tutorial section on SPECIFIC details on how to install LED's.
Sorry I couldn't be more helpful
Max