video to USB

According to these two articles:

http://web.belkin.com/support/kb/kb.asp?a=1700&langid=
http://web.belkin.com/support/kb/kb.asp?a=1775&langid=

1. It is not compatible with Mac OS X.
2. It is compatible with Mac OS 9.
3. It is not compatible with iMovie.

I'd sell the adapter and get another that works better with the Mac for your needs. Any adapter stuck back in Mac OS 9 days is 6 years behind the times.

I might add, if you are trying to use the Flexcam as a webcam, videochat camera, iChat in Mac OS X 10.4.9 works better with certain webcams that are USB than 10.4.8. Not sure which it does support, and there is the popular software iChatUSBCam which works better with most USB cameras than the built-in Mac OS X software:

http://www.ecamm.com/mac/ichatusbcam/

which may also work with it. If there is a different use for the Flexcam, tell us what it is, and maybe we can tell you if extra adapters are needed or not?

Oh, if you have an Intel Mac running 10.4.9, which you appear to have added to your post, please add that to your profile. I initially only saw 10.4.8 G4.