MUD: FIM Motocross World Championship [NPEB00925]

Well, this getting interesting. Check edat's manually, if they is really decrypred. If you see there NPD header, this means, that it's encrypted.

Make copy of NPEB00925 dir and rename it to BLES01551. Launch game still from original NPEB00925 dir. Try mine compiled build, and check settings, PPU Interpreter, SPU JIT, Resolution 1280x720.

I did what you said, but i completely don't understand what you mean by launch game still from original NPEB00925. When you rename the folder that copied, you got the new one and the old, so in the hdd0 you have two folders and in emu you got "two" games with different names. So i don't get.