Apple iMac G4 Desktop "sims 3 mac" Questions

...sims 3 world adventures, it tells me to change the regional code, the sims 3 was made in the usa, sims 3 world adventures was made in europe, so i don't know how to change the regional code for mac ...

Sims 3 won't install on my imac G4. I have Leopard 10.8 so I have the correct system requirements. When I click on install it keeps coming up Not supported on this architecture? If you read the system

Mac cannot find its start=up folder.This is caused by one of two things:-1. The hared-disk is going or has gone bad and will need to be replaced.  or 2. There is directory damage.Directory damage