wc3edit.net

I tried to change something in the war3map.j file, but now I dont know how to replace the original in the map because for this map MPQmaster did not work and I used rmpqex to extract the war3map.j file but i dont know how to replace the original. Can anyone tell me how to replace it without MPQ Master, since it crashes when I try to open this map

1. Use ladik's mpq editor to open the w3x file
2. Extract the war3map.j (can be in either script folder or outside)
3. Edit the extracted war3map.j
4. Replace the edited war3map.j over the existing war3map.j