Boot disk to play english backups on my Jap DC?

I have just bought a Jap DC for my daughter. The guy said "All you need to do mate is let the Jap game run for a couple of minutes, and when it stops, take it out and pop in the English Backup".

This does not work even with the Eutopia Boot Disk (doesn't stop spinning) QUESTION : Is there a Jap Boot disk for playing English backups, and if so, where can I get one????? Thanx Guys.