4 or 6 cylinder? A 2005 Camry 4 cylinder does not have a timing belt; it has a chain. The belt on a V6 is kind of tight. You might want to let a professional do it, but if you are determined, I suggest you get a book with good pictures and follow it, as the answer to your question would be too involved for this column, especially without pics.
Hope this helps! God Bless!