I checked Geotron and it loads fine on my PAL ps3. FW 2.30
Maybe you have a different version?
Itīs actually a fun little game.
Hereīs Ulaunch.elf 4.28 with working usb drivers for the ps3
and a port of the game Tyrian for the ps2 by user112.
it works using psxloader with option D. you have to copy all the files into the psxloader folder. you might want to make a backup of your psxloader folder first because it gets messy with all those files in there.
itīs not a bad game. I played it on the psp. itīs not fullscreen though.
PS3 EU 60gb CFW DEX 4.30, PS3 EU 60gb 4.30 Rebug