I have forwarded this to our web master.
there was never a tutorial for customizing the Power Messenger Theme, there was one for customizing the Power Store theme, though:
http://www.webassist.com/community/tutorials/view_tutorial.php?tid=11
it's a pretty similar process for customizing the Power Messenger theme's. The theme attached to the power store tutorial probably wont work for power messenger, but the process of using the web browser to inspect elements and locate css, then editing the css will.