When it happens, you will see it here. I suppose you can also check wololo.net. There will most likely be a tutorial that will show up on the GBATemp main page (the small section toward the bottom); they are ordered from latest to oldest.
well, thanks! BTW I follow your rxTools guide and forgot to switch to EmuNAND before updating it(my fault any way)! Got my 3ds from ebay like a day and this is what happened! lol