Q: I need to order (buy) a book made with iphoto; but I live in Portugal, so it must be delivered in Portugal; how can I make it, since the dialog box doesn't allow to use a different country?

iPhoto print products are available in the U.S., Canada, Japan, and select countries in Europe and Asia Pacific.

It doesn't sound like your country is one of the European countries with the service.

Apple doesn't answer here. This is a user to user forum only. If the service is not available in Portugual, then I suspect that there isn't a company there that Apple has confidence in or that Apple has cut a deal with.

There are online 3rd party companies that provide the service similar to iPhoto, but using your photos and your web browser. I would do an internet search for one in your country.