Can I remove Authorized Computers from my account without losing my library

I currently purchased a new MacPro 17" computer. I have an extensive music collectiona consisting of over 12,000 songs. I have purchased well over a 1000 from the iTunes library. When I accessed the iTunes store and purchased additional music on my new MacPro it was indicated that the new computer would make 5 that I have authorized. I only have two computers. The music was delted on the others and I need to de-authorize the other them, however I do not have access to them anymore.

I want to de-authorize the old computers without losing my music. I fear selecting "de-authorizing all" from the de-authorize process. If I do select the de-authorize all computers how will I turn around and authorize the two I want active? Will I lose my music library?

Message was edited by: dateasley

Message was edited by: dateasley