ipfilter 4.1.8 as loadable module on Fedora Core3

[dave]

Hello,
    I'm trying to get ipfilter 4.1.8 going on an fc3 box, but i'm having
difficulties pointing ipfilter toward the kernel source. For some reason fc3
doesn't put it's sources in /usr/src/linux, but in
/usr/src/redhat/build/kernel-version etc and ipfilter isn't finding what it
needs. The kernel i'm using is not the default one that came with fc3, it's
been through a few upgrades, it's 2.6.12-1.3.70.fc3 or similar. If anyone
has this going i'd appreciate a suggestion.
Thanks.
Dave.