Getting number of installed instances

[rally]

Using the brand-new InstallAware 8.0 and the feature 'installing multiple instances' I am looking for a way to get the number of already installed instances onto the system before starting with the setup procedure. Is this possible?

[Bar_BQ]

Hi,

I thought about it too and I figured out that the only possibility is to write an own script for this. But fortunately shouldn't be a hard piece