And we loop again: Noone uses PHP on 64 bit. That means we are confusing people with our dll files. When I see CUBRID-PDO-5.3-WIN64-VC9-TS-8.4.1.0001.bin.zip, I understand PHP 5.3, VC9, TS for 64 bit version of Windows. Noone will even think of the fact that PHP has to be on 64 bit to use this driver and therefore will download it, place it in the ext folder and of course it will fail to load.
WIN32 is the "nickname" of 32 bit version of Windows. That means the naming must be completely changed to comply with what you said.
Also, basically, all we are offering currently is the 32 bit version of the driver. If the user installs CUBRID on 64 bit, the user must manually copy the 32 bit cascci.dll in the PHP installation folder.