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.