Well, I live in Costa Rica, and this is what I did:
I bought the exam voucher at Sun Educational Services With the Voucher number I registered for the exam at Prometric Then, the day of the exam I simply visit the Prometric representive in my country. If you want to avoid all this paperwork you could contact your Prometric representative personally, typically they can help you to buy the voucher and book some space for your to do the exam.
Good look, comrade, and success with the SCJP!
Regards,
Edwin Dalorzo
[ January 15, 2006: Message edited by: Edwin Dalorzo ]