Have you ever read krayzie's n00b faq's?
NKPatcher is a kernal aka bios patcher, which means it edits m$'s retail bios to allow for our needs.
A Bios Loader aka pbl/ meetoo/fbl loads a modified bios, aka evox m series and eXecuter bios's....
Editing the LED in a bios loader is easly done using the bios editing tools supplied or in some cases editing the boot.cfg file.
Editing the LED in nkpatcher isnt supported yet!, so therefor you need to do it manually in the fonts.