Since I couldn't get the amd64 version of Ubuntu running under VirtualBox OSE I tried the i386 version. The installation went fine but when rebooting into the system I got this message, "PANIC: CPU too old for this kernel." I was hoping to have Ubuntu running under VirtualBox to spare me from always using my system for tests. It looks like it might take some research to accomplish that goal.

I just tried to install a 64-bit OS (Ubuntu Server) under VirtualBox OSE 1.5.0 and received the message, "Your CPU does not support long mode. Use a 32bit distribution. I tried toggling the "Enable VT-x/AMD-V" setting but that didn't help. I haven't investigated this yet but I will be disappointed if this is a limitation of VirtualBox OSE.