hello there,
i am experiencing some strange behavior with GR... or, better said, "no" behavior anymore

yesterday i downloaded a bunch of mods and the GR updater (to 1.4), and enjoyed the mods for an hour or so, and then my GR suddenly quit. no message, no crash log, nothing.
i tried starting up GR again, but the icon just jumps in the dock a couple of times and disappears again.
my first reaction: disable the mods and try again. nothing happened.
then i reinstalled GR from the cd. still no go.
this is very strange, i don't really know if anyone every experienced this?
system: G4 powerbook, macOSX 10.2.8, 1GB memory
i have a dual screen setup, maybe this has sth to do with it? (i tried with one screen, with two screens, no difference - GR just doesn't start up anymore)
my GR has worked fine for a long time, and survived every macOS update and GR patch, so i'm really stumped...
i also tried to locate the prefs file to chuck it out, but i couldn't find it
any help please??
twanne