[bitfolk] SPICE

Hi, I've been having an VNC issue to a Xen Windows guest where the VNC viewer reports it has disconnected if I raise the windows desktop above a certain resolution. Unfortunately, I now have a situation where I can't connect at all because the rez is above that value and I can't turn it down... because I can't get connected because VNC dies. Someone said I should really change from using QEMU+VNC to SPICE to provide my remote desktops (I understand it also either does or will provide cool stuff like remote audio and USB support). I've looked at the SPICE website and I'm really not getting the documentation. I'm not even sure if it's already installed on Xen 4.2.0. Is there anyone that has used SPICE that could give me the quick introduction please? Thanks, Paul.