While I am not an actual lawyer, I might be able to shed some light on the copyright issue. I'll see what I can come up with.
However, I can certainly help you out with the scanning issue.
I don't know what software you are using to scan the book, but if you have the full version of Acrobat, you can easily add scanned pages to an existing document, or just combine multiple .pdf's into a single document. It may be possible with your software, but I'd need to know what you are using.
-Sik