First if you want to change that “Apache Openmeetings” title on top, here’s where you do it:

Then just go down to where it says “currentappname,” and replace it with whatever you please.

Then, if you want to change the logo, get your own logo (should be 40px tall, and however wide you reasonably want to make it).  Then save it as logo.png, replacing the Apache feather with your own logo.  What if it’s too wide or not wide enough you say?  Not a problem, go down to the section (still in config.xml) “appdisplay” and change the x and y coordinates of both the text AND the logo to whatever looks good to give the logo and text as much spacing as they need.

Apparently there are hard-coded appearances of openmeetings that you can also change by overwriting the $APP_NAME placeholder but I haven’t quite figured this out yet.  I’ll save that for another post.