I do not know if this will help you at all but I recall a program by Ficedula called Reeve that could load up the PSX world map... if the source is out there, then it is definitely buried within the 2006 era qgears threads
The PSX game hasnt gotten much attention around here since Aali's PC driver came around
Im a little in the fog at this point so forgive my ignorance, is QGears still running native PSX data or does it all get converted to ogre friendly formats?