Getting very frustrated with the battery life on my 3DS in standby, but the steps to get it into gateway mode put me off powering it down all the time. Is there a safe easy way to get it to boot straight to Gateway mode? It's a 3DS XL with 4.2 firmware. The latest manual says something about menuhax but only talks about doing it from 9.2. And I'm not even sure if that is the best thing. TIA!