Hmm , I know most people are going to give yah random links. For your LED issue, goto Ebay, mouser.com, goldmine-elec, etc. Those are the main sites you can use to get LEDs, that's where I go at least, most people goto mouser, but they also have other sites. Can't say much on giving ya a tut for it, since most of them have pictures but the pics have broken links. The main thing to know is where to connect the LEDs. The main and strong point used is the 3rd pin (from the left) and the 2nd pin (from the right) of the GBA slot cartridge, on the ds lite. You can also use bt - and bt + but the LEDs will ALWAYS stay on and that will suck up your battery life nasty.