The source code for your current Kernel, in my case at the time of this writing it was kernel 2.6.17-1.2187_FC5smp.
You will need the to download the source code for the web cam driver here:
Unpack the tar file and then go into the directory it upacks to. Run Make and as root run make install. Now unfortunately even though it runs the install correctly it doesn't get anywhere that 'insmod' seems to see it. So you need to copy the .ko file to a directory it belongs in.
as root: cp gspca.ko /lib/modules/2.6.17-1.2187_FC5smp/kernel/drivers/input/misc/
Now the kicker 'insmod' still won't see it SO i did a neat little cheat. Go to the directory you copied it in using a GUI file browser as super user. I don't know if this works in Gnome but in KDE you can right click it and select "Open With" and in the dialog box type insmod then select 'OK'.
I tested it with Camstream and I can see myself on a screen and I have it taking shots every 15 seconds. Its working though the picture is a bit grainy.