The only thing I have at hand, is a program that allows you to change the softkeys on the bottom of your today screen (attached at bottom). Now I'm sure you can find a program that will allow you to actually add a 'Start' button at the bottom, I'll try and hunt one up for you later, but for now, I'll give you the link to the site I get most all of my freeware from.....
http://www.freewarepocketpc.net/