Marcos,
As far as I know there are no changes on assignment since you have downloaded it and I think you can work on a solution based on the material that you already have, moreover you can use any J2EE version available. Although there is a problem yet, your voucher is not valid anymore so you can't register for Part III of the exam. I'd strongly advise you to get in touch with Sun Education Center to find out how you can turn able to do Part III, probably you will have to buy another voucher. Regarding the Sun Education Center you can visit
www.sun.com and access education part to get to know education phone number...
I hope this help .
[ May 16, 2006: Message edited by: Paulo Nunes ]