Simple solution is available and still the simplest of all and works, it's Sky3DS. GW since the beginning has never been easy to use but that's the beauty of it... it allows for more than just being a flashcart... and that's a good thing IMO.
Sky3ds doesn´t have very much time since it released into the market so gateway already had a pre-existent market share by the time sky3ds was released.
Now, even the early gateway procedure to install the hack (the original mset exploit) wasn´t simple if we compare it to sky3ds but atleast the instructions were pretty clear (basically drag and drop files through the microsd cards and the main sd, launch ds cart, install hack, launch ds profile = success!). And thats my actual critic to gateway, that the instructions were everything but clear, if it weren´t for this board i wouldn´t have been able to install the mset hack on my n3ds: the instructions provided by gateway would have led me to nowhere.