> i havent built a custom kernel under openbsd yet.. so not sure what needs to
> be done. built plenty of them under FreeBSD. Is it anything like the way
> its done under freebsd?

Pretty close: refer to FAQ 5.4 for details.

> Is the SB Live driver under openbsd broken? surely my system has enough
> resources.. dunno what the problem is there..

I can't say anything without a complete dmesg of your system.

> anyways.. back to the ICH5, how do I apply the patch?

Save the patch to a textfile, tehn
cd /usr/src/sys/dev/pci
patch < the_file_which_contains_the_patch
and recompile a kernel.