Unfortunately I'm still running 32 bit Fedora 14. I tried the 64 bit version, but had some problems with Firefox and Eclipse.
I've put off upgrading because of Gnome 3. I tried out the Live Disc for 15. It didn't convince me.
Since then I've heard enough good things about Gnome Shell that I'm willing to bite the bullet. But just to play it safe I've been waiting until I have a few days with no meetings. So meanwhile...
I added memory and installed the PAE kernel.
sudo yum install kernel-PAE
Pretty simple and my machine immediately recognized the extra memory.
