Downgrading Kernel

Hi ! As a good sys admin, i'm upgrading my servers using Yast2 (by hand for the moment). The last upgrade installed me the kernel release 286 (2.4.21-286). Some of the applications running on this servers doesn't support this new kernel. I would like to know the best way to downgrade the kernel ?? For the moment I'm thinking of removing the current installed kernel (ie. rpm -ev k_smp-2.4.21-286). And then doing an online upgrade to choose the kernel I want. Will this method work or do you have a better one ? Thanks in advance. -- Cordialement, Best Regards, Jean-Christophe VALIERE jcvaliere@unog.ch