Jailbreak your Super NT to be able to play Roms from your SDcard (Google it, I'm not putting it here)

Make a new folder on the top level of the SD card called "SNES" and put your romhack roms in there. You can make subfolders (and subfolders in subfolders) to organize, but the limit is 300 files and folders in one folder at a time.

Find the romhack files from your current emulator, they will typically end in .SMC or .SFC. Copy those to the SDCARD:/SNES/ directory. Should look like this:

In that same directory where your roms were, you'll likely find the save files, typically ending in .SRM. Copy those to the SD:\SAVES\SNES\ and change the extensions from .SRM to .SAV to be recognized by the Super NT. Should look like this when you're done:

That's It. Put the SD card back into your Super NT, turn it on, and select "Browse SD Card":

Find your romhack, and press the confirm button to launch it: