I am setting up a site using WSS, for our clients. Each client will have a subsite of this top level site. I was hoping someone could help me understand how I would have a different client logo in the top right corner for each subsite and all the pages in the subsite.
Eg. If Microsoft is one client that I have created a subsite for, I need the Microsoft logo to show up in the top right corner of every page in this subsite. and if Apple is the other client subsite that I have created at the same level as Microsoft, all pages in this subsite should display the Apple logo.

How can I achieve this??