I'm doing this from Outlook 2003 and assuming there isn't much difference
with 2007:
1. From your Inbox, go to Tools, Options, Mail Format
2. Click on Signatures
3. In the next window, click on New or Edit if you already have a signature
that you want to add the logo to.
4. In the edit window, right click where you want the logo to go and you
will get a right-click menu with the option to "Insert Image". Select such
option.
5. You are then prompted to browse for the image that you want inserted.
You may need to do some tweaking to get the layout correct. You also need to
have your Message Format set to HTML to display images. That option is under
the Mail Format tab too.
Barry