I will try that out. I think that would be a good Enhancement Request since it will allow us to test all the design logic without the need to test in another computer until the project is near done, and specially new users like me
Things that really accelerate testing are using uncompressed builds. Don't try other build types as compression will take a while - until you're near RTM.
The problem with commenting out Apply Install is that you'll never see how the installer behaves after an installation.