I had a RH7.3 system. I upgraded via Centos5.3 CDs I upgraded this system further via Yum. Current problems: 1: nvidia GF6800 Xtreme video card has no kernel module, so I have command-line only. 2: Building a kernel module requires downloading (at least parts) of the kernel; there is no clear label "yum install kernel-module-build-enabler" 3: Downloading the whole source tree (yum install kernel-devel) should suffice, but the downloaded kernel source tree does not compile ("make oldconfig;make proper; make" fails with no rule to make init/main.o) 4: Downloaded kernel module for nvidia fails to load; modprobe nvidia protests the different kernel build vs module build and bombs out What's the system builder to do? ******************************************************************* This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.Hubbell.com - Hubbell Incorporated**