System Software 7.5 does not include any drivers for the Apple PowerCD player. The PowerCD player comes with its own software, which must be reinstalled if a clean installation of System 7.5 is performed. If you use the System 7.5 installer to update an existing System Folder that already contains the PowerCD software, it should not need to be reinstalled.
We are not aware of any compatibility issues with the PowerCD software and System 7.5. We tested PowerCD Setup version 1.0.1 with System 7.5, and were not able to find any faults.
The CD-ROM software that comes with System 7.5 is the same software that comes with other Apple CD-ROM drives. The Apple PowerCD has never been compatible with this software -- a design decision made during the development of the PowerCD player. Since this software was not compatible with the PowerCD player, it was not able to recognize CD-ROMs or audio CDs that were in the PowerCD player.