Outlook 2007

I want to do something that I believe should be very simple but for being so
simple I cant figure out how to do it.

I receive a large number of emails that require the same various responses.
I need to include the original email so what I want to do is have a button
that does something like this.

Reply to using this template.

Push the button and a list of my templates appear and I select the template
change a few details and clic send..

How in the world do I achieve this?

Many thanks in advance and sorry for such a dumb question..

Bob