Download and compile kernel
first, download kernel source, like kernel.***.src.rpm
after extract it, go to the /usr/src/linux***
make clean
make menuconfig
make dep
make bzImage
make modules
make modules_install
make install
yum update kernel
download from SRPMS
ftp://ftp.muug.mb.ca/pub/fedora/linux/core/5/source/SRPMS/kernel-2.6.15-1.2054_FC5.src.rpm
yum install kernel-source
yum update kernel-source