print from xp guest running under virtualbox on ubuntu host

Good stuff:
http://funwithlinux.wordpress.com/2009/05/22/sharing-ubuntu-host-printer-with-windows-xp-running-in-virtualbox/

Only issue is doesn't explain how to find url of ubuntu host from within guest system (host isn't running webserver.  would that make a diff?  idk)

To find use ifconfig, address under vmnet1 (vmnet1 is virtualbox, vmnet8 is  vmware.  I think that's standard)

Installing VirtualBox Guest Additions in Ubuntu

in guest:
install dkms & gcc if not already:
sudo apt-get install dkms gcc


install generic kernel headers
sudo apt-get install linux-headers-$(uname -r)
uname string passes kernel version to apt


download/mount guest adds .iso, cd to .iso and:
sudo .sh ./VBoxLinuxAdditions-x86.run install
reboot guest, gtg