I am pleased to advise that the 580 patch has now been put on the Internet as a link outside FTM Help>Check for Updates
The link is the FTM Bloghttp://blogs.ancestry.com/ancestry/2012/05/18/family-tree-ma...
It links tohttp://ancestry.custhelp.com/cgi-bin/ancestry.cfg/php/enduse...
This second link has links to downloads to your particular version of FTM
To check what version of FTM 2012 you have go to Help>About FTM
You can download the appropriate patch to a memory stick and install it to a computer not normally connected to the Internet, or where Help>Check for Updates indicates that your FTM 2012 is up to date