just follow this if your having troubleI just press romfs.bin and save it, like in the video.
1 drag your .3ds rom onto "crtkeygen.exe" this will create a file called ncchinfo.bin in the same folder as your rom
2. copy the XORpad generator (launcher.dat) from the "For the 3DS SD card" folder in this download to the 3DS's SD card
and the ncchinfo.bin that was generated in step 1, then pop the SD back in the 3DS and go to DS profile, this will generate the
Xor pads used to decrypt the game.(this step can be a little buggy if it stays on "opening ncchinfo.bin" for more than a few seconds
reset the console and repeat untill it kicks into action)
3. copy your ROM and XOR pads here, leave out any CTR-P-CTAP.romfs*.xorpad files they are un-needed and may cause issues you just need
the 3 Xor pads for the game exefs,romfs and exh
4. run unpackv2.bat, enter your roms filename (may help if you rename it to something easy like rom.3ds)
go into the "decrypted" folder then "romfs",
have fun
thanks to ground for the neat and tidy decryption script,and everyone involved in making the tools
http://filetrip.net/dl?klFzuXHgmF
and you can start at step 3/4 if you already have the xor pads