It turns out that the CheckPoint VPN-1 SecureClient for Leopard (OSX 10.5) doesn't work on Snow Leopard (OSX 10.6) due to differences between the two versions in the kernel and the way kextload works.Harald has a blog entry detailing how to fix the Leopard package so it installs on Snow Leopard and then fix the installed files so they properly run as well. He alludes to a method to fix the package itself so you can install it on multiple Macs without manually making those changes.
I took it upon myself to modify the package and am providing it here. Feel free to use it at your own risk. You can verify the authenticity of the file by running the following command to get its checksum:
You should get the following output:
3505974925 22321216 SecureClient-VPN-1.zip