Systems Management

Hi Guys, Really need some help with something. We have a clone image which has been running fine, we have all our apps on it and configured how we want them. Now we are playing about with Active Directory 2003 to see if we could use it instead of ZENWORKS[:@], Any way we have created a new application and assigned it to a user. The Application hooks into MS Word and is used within Word. Now i want the application to install when a user opens MS Word........But the file extension .doc is not in the list of applications to install on and i see no way of insering .doc

Anyone have any ideas on how i can get this to work?

Any help would be great