I have a plain vanilla Centos source (not 100% sure where we got it from), but I can't seem to get a build that installs correctly. I tried the method described at http://wiki.centos.org/HowTos/Custom_Kernel, but rpm doesn't like the output file, and even if I install it with -F, nothing seems to happen - no new kernel, now initrd, nothing. When I tried following the directions in the README file that came with the source, I built the kernel just fine, but the instructions then go on to describe how to modify LILO to make the install work, and my boot loader is GRUB - not sure how to reconcile those two. So, I built yet another kernel (rpm) following the guide at http://www.howtoforge.com/kernel_compilation_centos, and the rpm built just fine, but when I run mkinitrd, it complains that I don't have the ahci module in my kernel. The only reference I have found to ahci is in my boot setup, and it is already enabled, so, once again, I am stuck. Anyone have any ideas here? I'm running Centos 2.6.9-42.0.3ELsmp on a Dell Precision 390 (P4/HT 3GHz, 2Gb mem, ATI FireGL 4700, 160Gb SATA, ... Thanks (again).