Dan, why dont you try this program
http://www.mediachance.com/realdraw/
You can download a 30 day fully working trial from here. Its such an easy program to use. This is how I did my screen. I am keen for others to also make some screens and post them online for others.
When designing a mach2 screen make sure you just make it one big Bitmap other wise you will get into trouble with the layers in Mach2 screen editor.