I would like to share some info on DC.I have 2 DC which is US and Jap version.

US DC:

Japanese game (What Shenmue? & doraemon): Can only use gameshark lite to boot.
Pal game(Shenmue 2): can boot using utopia disc.

Jap DC:

US game (Shenmue) : Can only use gameshark lite to boot.
Pal game (Shenmue 2) : Can only use gameshark lite to boot.

Note:the gameshark lite must be original otherwise it wouldn't work.Hope it helps.