for your "umd-mode" select "iso anyumd" and keep the 250(ms hook) set. gta is jerky when booted with devhook. look into the mphgameloader method for that game. some other games need patches, so lookout for that also.
also, there is a devhook pack around that already has the flashes included. i found in the torrent network (great resouorces there).
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