I'm not sure which version of the code you are using, or if you are using the Falagard system for skinning - but you can do what you need by creating a custom skin for a StaticImage (if you are using 0.5.0 code, you can use DefaultWindow which would be even better). If you use a StaticImage with the frame and background disabled, then just provide ImagerySections with your custom rendering, and apply these in the appropriate state definitions.
Effectively you just need an ImagerySection with three ImageryComponent definitions in your WidgetLook; one ImageryComponent for each of the end pieces and one for the central area. It's possible to add PropertyDefinitons to the WidgetLook in order to have your logos and colours assignable in code or layouts by using the properties system.
The best advice is to look through some of the simpler entries in the looknfeel files, to get a feel for what's possible and then modify one of those until it does what you want. If you need more specific help, post again - though try to avoid asking us to write the whole WidgetLook for you
CE.