First, you won't be able to install the BeOS onto such a system. But even if you could, it wouldn't run. The BeOS simply will not work on these systems. There is a lot of engineering work between the BeOS and 601-based systems, and right now if it would even start loading (which it won't), it would crash immediately.
Really, we're not making this up while secretly telling our friends how to run the BeOS on their 7200s!