Yes, the installer is a simple script that allows you to install boot.img to the Boot partition and copy a new System drive to a partition. ...this does include Apps, Tools and Utilities etc. as well as MOSSYS: so if you move any of thes about ... beware you may end up with redundant versions.

Regarding an upgrade...be sure to check MOSSYS:Libs , Classes etc. against the user SYS:Libs etc. in case more functionality is added in a new release and your old 68k/whatever version is still hiding away....

Steve