You can try to edit "system.txt" file
it is
// OFFICIAL PORTS : PC, WIZ, WII
// UNOFFICIAL PORTS : HANDHELD, XBOX, PSP
system = WIZ;
// LOADING TYPE : POST, REALTIME
loading = REALTIME;
try to change to:
// OFFICIAL PORTS : PC, WIZ, WII
// UNOFFICIAL PORTS : HANDHELD, XBOX, PSP
system =...