Bom... não conheço esse GTA... mas tenho certeza de que é um mod...
Links:
http://rapidshare.com/files/102937842/GTA_Myriad_Islands_upsmack.part0…
http://rapidshare.com/files/102944052/GTA_Myriad_Islands_upsmack.part0…
http://rapidshare.com/files/102949782/GTA_Myriad_Islands_upsmack.part0…
http://rapidshare.com/files/102954298/GTA_Myriad_Islands_upsmack.part0…
http://rapidshare.com/files/102956169/GTA_Myriad_Islands_upsmack.part0…