Anyone know why the following occurs, and how to solve?

We have a G4 with Mac OS X 10.2 and it currently prints fine to a variety of
printers. We want to add a Canon i6500, and inserting the driver disk (or
downloading from websitre) starts the installer, accepts the password for
admin auth, then when you click Install, it just does nothing - you can
continue to click Install or Back or whatever... but no progress is made
beyond that screen. Canon are no help! Have confirmed removal of any
previous Canon 6500 stuff (there was none). The printer is USB, not plugged
in yet, and works OK on a W2K PC.

Any help appreciated.

Mike