I play the pinball games quite often on my 040 BPPC Amiga. The main setting that should be enabled in s:whdload.prefs is chipnocache for ppc cards. Thats will bring the success rate of running games up much higher. NoAutovec can be a useful option too. Generly no game specific settings required, maybe nocache for some older games.
Just be sure no tcp stack is online (can be running) and you should be problem free for the most part. If using a Mediator make sure VoodooInt is dissabled too.