Thanks all you guys. After 7 hours, a lot of coffee, some Google Translator and with a precious help from my wife, the iBook is running OSX 10.5.8 in a Maxtor 160Gb, 5400 rpm (the only one that I found here, in Santa Efigênia street, São Paulo). I am very happy and grateful for this site and its amazing community. Thanks again guys, you are the best. And sorry for my bad english!
Caio