Guys, I found the best and fastest way to do it on n3DS.
OK, bear with me here.
1. Move all your homebrew except FBI and memchunkhax2 into some other directory.
2. Install menuhax if you haven't.
3. Remove the battery cover.
4. Enter Homebrew Launcher through menuhax.
5. Enter FBI and spam A. (Skip to Step 8 if you succeeded)
6. Didn't work? Remove the battery (this will reset your time and date but this is the fastest method).
7. Repeat Steps 4-6.
8. If your input is botched (rarely detects button commands) be very careful.
9. PLEASE, FOR THE LOVE OF GOD, PUT YOUR 3DS ON A FLAT SURFACE TO AVOID ANY POSSIBILITIES OF THE BATTERY FALLING OUT DURING INSTALLATION.
10. Install all your CIAs.
11. You're basically done, put back on your battery cover, take your other homebrew in the other directory to their original location and do whatever you want with menuhax. Uninstall or leave as it is, that's up to you.
I got this working in 10 tries, installing a bunch of CIAs as we speak. Man, it pays off experimenting yourself without trying all these cancerous suggestions I've been seeing.