hi m8 u dont really need a tutorial for that sorta stuff, u buy the led's desolder original ones and put ur new ones in, if u arnt confident enough to do it u might be better asking someone who does mods for people alot, if ur uk i can help ya out
Here however if u know wot u can do with a soldering (i mean if u know how to use one hehe) id be glad to help ya out with wot led's to get etc an tips for desoldering original ones