ok.. ill try to explain it... keep the msD you use for your emunand somewhere safe.. make sure it has the mset cia from your region..... on another msD card...(use a 4gb one) format it and put devmenu.3ds also put the launcher 3.2 in it... with the 3ds off put that card into the 3ds.... boot into the GW menu.... go to the far right and install the nvram thing..... once it finishes put an empty red card into the card slot and boot into GW mode... once there remove the msD card and put that card into the GW Red Card... hit select and dev menu will appear.. hit A.... find the mset CIA from your region and install it... exit and reboot... and find the ds profile.....
Turn off N3DS.
Remove N3DS-MicroSD card that has enuNAND.
Find blank MicroSD card and put the region-specific MSET file on the root of it, as well as the new launcher.dat.
Find DevMenu.3ds, not BigBlueMenu.3ds. Only the older DevMenu.3ds will work here.
Put DevMenu.3ds onto the MicroSD card that's in the Gatweay cartridge.
Put the MSET MicroSD card into the N3DS and the DevMenu.3ds MicroSD card into the Gateway.
Power on, run Cubic Ninja or Zelda exploit to get into Gateway Menu.
Select "NVRAM Install" and proceed with instaltion. This will install to sysNAND, because the emuNAND card is not in the N3DS right now, and that's what we want.
Start Gateway Mode and launch DevMenu.3ds (by pressing select).
Import the MSET CIA to install it to sysNAND.
Turn off N3DS.
Take out the N3DS-MicroSD and replace with the emuNAND MicroSD.
Turn on 3NDS.
Go to Settings > Profile > Nintendo DS Profile to start the Gateway Menu.
NB: Running a DS game will erase the DS Profile Exploit. If this happens, use the Blue Card and run Gateway Installer.
-- Has anyone actually tried using the blue card (with flashcardtimewarp.cia + mset.cia) and confirmed that it works to install the exploit?
-- What exactly does Gateway's nvram install do anyway? It's not installing the mset.cia because you're doing that with devmenu. So what is it doing instead? Is it just installing the exploit? If so, does installing flashcardtimewarp and using the blue card to install the exploit mean you don't need to use "NVRAM install" at all?