Well I know it works on my DC. Had it for 10 years. JUst hope it can be used as a boot disc. Sounding like maybe not. Real shame. Still will proudly display it.
i also used a gameshark to play my PAL Shenmue 2 on my US dreamcast back in the day. it was called gameshark CDX (or somethin like that) put in gameshark and pick start game with no cheats. swap out gameshark disc for S2 and VOILA!