well, yes you have todo with original mapthis - but there's an unofficial version out of mapthis. if you take this one, it starts up with 111 Mhz and after fixing satellites, changes back to 333 or 222. if you installed it on your ms, be sure you have correct eboot.pbp on ms for your psp290. after you installed the maps on ms you can run mapthis. after finished loading the map, you can turn on gps by pressing the square button.
by pressing start button and select satellite infos you also can see your status...
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