okay so, you should know how to change textures if you got this. if not, this is how.
ALSO. ONLY MSCLOADER IS SUPPORTED.
1. go to your mods folder
2. go to assets
3. open the file "g_NSR50_SA"
4. paste in the texture you want (if you copied it, of couse)
5. delete the original texture (dont worry, its still in the original download if you want it back)
6. rename the fuji texture you selected to "nsr50_cowling"
7. launch game (IF GAME WAS OPENED, RELAUNCH IT OR GO TO MAIN MENU AND RELOAD GAME)
8. profit