Have a nice spiffy installation program that's ruined by a popup install of the .NET Framework from Microsoft?  Did you know you can install the .NET Framework silently?

From Brad Abrams:

For .NET FX 3.0: the magic command line is: Dotnetfx3.exe /q
See this white paper for more details.   

Oh, and if you are still on .NET Fx 2.0, the command is:  Dotnetfx.exe /q:a /c:”install /q”