Kyocera and Copystar models are the same just replace KM with CS.
The following instructions should help you. TO download the current driver use this link to th emanufacture website; http://usa.kyoceramita.com/americas/jsp/Kyocera/resource_details.jsp?rid=18657
Kyocera Printer Drivers and Mac OS® X 10.5 Leopard FAQ:
Is the installation for Mac OS X 10.5 the same as for Mac OS X 10.4 and earlier? Mac OS X 10.5 introduced a new printing architecture that requires changes to the installer and installation process. For this reason, Mac OS X 10.5 requires a new printer driver installer.
I cannot see my Kyocera AppleTalk® printer. How can I make it visible to OS X 10.5? AppleTalk is disabled by default in Mac OS X 10.5. Enable AppleTalk to discover your Kyocera printer.If you use the Kyocera installer, a message will appear, asking you to enable AppleTalk. Click Yes to continue the installation.
I cannot find Printer Setup Utility on Mac OS X 10.5. Is it still supported? Apple has removed Printer Setup Utility from Mac OS X 10.5. To install a printer, open System Preferences and click Print & Fax.
When I manually install a printer, multiple PPD files are listed for the same Kyocera model. Which should I choose? When manually installing a printer or changing a PPD for a installed printer, both Linux and Mac OS X PPDs are listed for some older Kyocera models due to a change in PPD handling in Mac OS X 10.5. Linux PPDs can be identified by the word Gutenprint in the PPD filenames.
Supported Multifunction Printers: KM-1650, KM-1815, KM-1820, KM-2050 ,KM-2530 ,KM-2550, KM-3035, KM-3050, KM-3530, KM-4030, KM-4035, KM-4050, KM-4530, KM-5035, KM-5050, KM-5530, KM-6030, KM-6330, KM-7530, KM-8030, KM-C830, KM-C830D, KM-C850, KM-C850D, KM-C2520, KMC2525E, KM-C2630, KM-C3225, KM-C3225E, KM-C3232, KM-C3232E, KM-C4008, KM-C4035E, CS-1650, CS-1815, CS-1820, CS-2050,CS-C2525E, CS-2550, CS-6030, or newer. Supported Printers: FS-820, FS-920, FS-1018MFP, FS-1020D, FS-1030, FS-1100, FS-1118MFP, FS-1300D, FS-1800, FS-1800+, FS-1900, FS-1920, FS-3800, FS-3820N, FS-3830N, FS-6020, FS-6026, FS-9100DN, FS-9120DN, FS-9500DN, FS-9520DN, FS-C5016N, FS-C5020N, FS-C5030N, FS-C8008N, FS-C8026N, FS-C8100DN, or newer.
I hope this is helpful,