Templates, Permissions, and Sharepoint

I just ran into an interesting problem with SharePoint and Word Documents. This one I am not sure there is an easy solution for. If anyone knows of a better way of doing this please share. 

I was assigned the SharePoint implementation project shortly after starting my contract with DCFS. At the time, they had a shell of SharePoint setup and had a basic document library site setup already. Sean, who is our technical writer, began working with me on the logistics and how DCFS would like to see their doc library work. Having not worked with SharePoint since my Bond days, I figured I'd test this latest version out. 

I began by playing around with the existing document library site, setting it up, breaking down, and doing it all over again until I got comfortable with the latest version. We had a few documents we were playing around with on the test doc site, and decided to go ahead and create our production site and implement what we had learned. 

After we finished the production doc library site, we started moving some documents into it. Things were going pretty smoothly until a few of my co-workers started getting prompted for a user name and password. Why all of a sudden were they getting prompted for a login when they would open a document that had been posted. They hit cancel in MS Word 5 or 6 times and then the doc opens right up.  Ok... what the hell. This is setup to use integrated windows authentication. I have verified their permissions in the site, but yet they are still getting prompted for logins. 

Come to find out, the documents we had created on the test site were moved to production and revised. Those documents still pointed to the content type templates that were still pointing to the test doc library. A library other users do not have rights to access. Here is how we managed to fix it. 

Removing document templates from Word documents stored in SharePoint. 

• Check out and open the document in SharePoint, this will launch MS Word.
• In MS Word Click Tools > Templates and Add-in's
  
• In the Templates tab, delete the text in the filed under Document Template. 
  
• Then type in Normal
  
• Click OK
  
• Save your document, check in and publish.  Your all done. :)

Now the real question, and one that I forsee coming soon when it's time to move team documents from a team site into our public doc library. Not everyone will have access to the team site's library, since the doc originated at the team site, the template will also be pointing there. Most users aren't going to know the steps above. So there has to be an easy way of being able to migrate documents from one library to another and updating the template path at the same time. Unfortunately I haven't been able to find a solution to this.