I own a PowerBook G4 1GHz, 15 inch, Titanium DVI with UJ-815-C superdrive. The drive read CD's fine but would not recognize DVDs. I bought an Apple UJ-825-C DVD/RW Superdrive and installed it as an upgrade replacement. The computer profiler does not recognize the existence of the new (used) drive. Do I need to perform a firmware update or install a special driver for the computer to see the new drive? System is 10.4.11 I checked the archives but couldn't find anything.