Mac Driver software for Gigaware webcam?

I just bought a Gigaware® 2.0MP (8.0MP Interpolated) PC Camera w/ Auto Focus to use with Skype. It does plug and play without a driver and worked for me last evening. The webscam has an auto focus, however, which seems to need its driver to operate correctly. Does anyone know whether there is and if so where I can perhaps download a MAC compatible driver for this webcam? Thanks. Using it with my PBG4 operating OS 10.4.11. Thanks again.