Oh, by the way, that scratchbox tutorial is for Linux desktops, sorry, no help for you. I'm not even sure there's a way to make an app installer package from inside Windows. In other words, once you have your application working and you want to distribute it, you'll need to build a debian package of it. I don't think you can do that in Windows without a virtual machine.

You could always get VirtualBox and run Ubuntu in a virtual machine on your Windows laptop. Or just bite the bullet and format