How to Make Word 2003 or 2007 the Default Program to Open .DOC Documents

I just helped a user to install Office 2007 without uninstalling Office 2003, because we want the ability to use applications from both versions. The problem is after installing Office 2007, the Word 2007 is now the default program to open .doc documents and this not what the user wants.

Start / Run . . .

“C:\Program Files\Microsoft Office\OFFICE11\Excel.exe” /regserver
(you need the double-quotes since there is a space):