I don't think there's any specific file you can search for that would find what you need. Anyway, you can't simply copy an installed Office to a new computer or drive. It won't work because the installer is responsible for creating several hundred registry entries to tie everything together.
If you have the original installation CD, that will still work as long as you have the 25-character product key. If you don't have the CD but do have the key, you may be able to get a replacement disc as described at
http://support.microsoft.com/kb/326246, but it's a good bet that Microsoft no longer has any stock of Office 2007 discs.
As a last possibility, if the key you have is for the Office 2007 Ultimate edition, I can supply an .iso file of the installation disc as well as the update installer for Service Pack 2. (When that version was released, each edition's installer was separate and would work only with keys for that edition. Later versions packed all the editions into one installer, which determined which edition to install by reading the key.) If you can use it, send me a PM to get the URLs of the two files.
Also JoeP, Stuart, and a number of other Loungers. This place is loaded with experts, with and without MVP credentials.
