NES Emulator help, plz

So, I downloaded the nes emulator off this site. Then it came with and app folder and within that folder had a folder name FCEUGX (which had the .dol) then it had another folder just named FCEUGX that just had 2 sub folders rom and saves.
I took the FCEUGX folder that had the .dol in it and pasted it onto my app folder on my sd card. (I changed the FCEUGX.dol to boot.dol) then put the FCEUGX folder that had rom and saves in there too. I put the nes game I dled into the ROM folder. When I load it via homebrew it says this is an invalid wii application.. The ext that shows on home brew is /apps/FCEUGX/boot.dol
Anyone know what I'm doing wrong?

the FCEUGX folder that had rom and saves goes in the root of your sd card