I'm sorry I don't have a solution or guidelines for you, running a 2.4 kernel.
The pwc driver development has been taken over by someone else after 0.9 was out and the maintainer just stopped.
This new driver is located here:
http://www.saillard.org/linux/pwc/ and I have Slackware 10.1 and 10.2 packages for the 0.10 release of pwc here:
http://www.slackware.com/~alien/slackbuilds/pwc/
Note that the new driver is only for 2.6 kernels, and the developer states that the patches he made for the 2.4 kernel are not tested at all.
You might want to consider switching to a 2.6 kernel if you want to keep using PWC?
Eric