The file /lib/modules/2.4.18-0.1/build/include/linux/rhconfig.h from kernel source includes /boot/kernel.h, but this file no longer exists.
That file gets created on boot so it better exist.
It works fine for me on my beta2 system; what version of initscripts do you have installed?
Yes, you are right. It gets created on boot correctly. Not sure how it disappeared on my system. I'll close this for now.