You can do that on the tracfone website. Since it was just 2008, I'm assuming that it is a digital phone, so you should not have any problems.
Read on their website about their newish International calls deal. I haven't read about it becaiue it doesn't affect me, but I think you can use it certain other countries other than the US now. I don't know if you ahve to ahve a certain model of phone or if it works on all phones.