Customizing the WDS PXE Setup page

Hello everyone,

I'm trying to figure out a way to customize the initial WDS setup screen that clients see to include a message or company logo.  Any suggestions on how to approach this?  I'm using WDS on Windows Server 2012 R2.

I'd like to customize this screen here, to include more information in the available whitespace..

Image may be NSFW.
Clik here to view.

Does anyone know if it's possible to edit this or where these files would be located?  Is it in the boot.wim somewhere?

Thanks.