Virtualization without extensions?

[Patton Echols]

The ubuntu server guide section on virtualization has this comment at 
the beginning:

"Before getting started with *libvirt* it is best to make sure your 
hardware supports the necessary virtualization extensions for *KVM*."

My server does not.  What the guide does not say is how well or if 
virtualization will work without hardware extensions.  Does anyone have 
any experience with this?

The server in question runs my backups and intranet wiki.  I suppose I 
could "just try it," but I'd really prefer to not break it or do 
something difficult / time consuming to uninstall.  Thanks for any thoughts.

--PE