MT and I are going to submit a proposal for DH 2011 about plans for IMT 2, so we need to create some mockups for screenshots. In the process of doing this, I can also create some new icons I'll need, and try out various configurations for the application GUI layout, so it's quite useful. I've created three new icons which look OK (although I might thicken up some of the lines a little to make them clearer at small size), and I've made some progress with basic toolbar and menu setup.