InstallAware

Using Microsoft's visual studio setup project I am able to call .NET installer classes and pass parameters to them using this format: testing.dll /testing=[VARIABLENAME]. Is this not supported in Installaware. I see you can call the .NET installer class but haven't found a way to pass in parameters yet. This would be very useful especially since Microsoft supports it in their installers and I don't want to have to use their setup projects.

Thanks