I should have been a little more clear with my '''Yes, "yum update" will update the kernel, too.'''... It will only update to the latest version available in the repositories you have listed in your /etc/yum.conf . If your repos don't have a 2.6 kernel, you'll have to find a repo that does, or download an RPM and install it manually, or download the source and compile your own kernel.
I don't know anybody who supplies a 2.6 kernel for FC1. You might try << www.FedoraNEWS.org
>>... They might have an article about it.