I tried Capital Punishment today and i just get a reboot after the code screen, that was with just 2mb chip ram. But if i try it with additional fast ram i don't get a reboot after the code screen it just stays black.
I also tried Slam Tilt which appears to work well on winuae but i haven't tried it on a real cd32 as i have no A4000 keyboard so i can't run any conclusive tests.
Another thing regarding Slam Tilt is the patch which allows you to use a cd32 pad when playing but it doesn't allow control of the menu, the program joy2key does map cursor keys to the pad which would allow menu selection but you would still need the return key to confirm.
EDIT: There is also a bugfix on aminet for Slam Tilt which is supposed to address in game hanging when not launching from workbench. Perhaps this could fix the crash on the cd32.