Thank you I reread the Introscope 9 Release Notes 1565954 and saw this:
Solution Manager 7.1 up to SP08 only supports Introscope Enterprise Manager releases up to 9.1.0.x (see note 1868086).
I remember reading somewhere that I needed to install 9.1.5 and that document was probably for a newer version. So, that's probably why Solution Manager was looking for a different type of installer.
I'm going to give that a try.