Question : Centos - PAE kernel how to convert to non PAE kernel

Hope someone can help.  I have a remote server running Centos 5.3  PAE kernel.  It would appear that this is causing me performance issues with a certain application and it has been suggested that I shouldn't use this.  Is it possible to convert to the standard kernel without a re-install of the os?

Answer : Centos - PAE kernel how to convert to non PAE kernel

Of course, first make sure You have the regular kernel installed
# yum install kernel
then either remove the PAE kernel (yum erase kernel-PAE) or simply pick the non-PAE kernel to boot. To boot non-PAE kernel edit the /etc/grub.conf and point the "default=X" to non-pae kernel. The first kernel line is denoted with default=0, second default=1 and so on.

Mind, that PAE is required to support more than 4GB of ram(I believe).