Using EventGhost 0.3.7.r1462 on Windows 7 Enterprise, updated regularly with Windows Update.
I have a normal computer monitor connected to my PC. There is also a DVI cable connected to the receiver of my home cinema setup. Windows is set up in such a way that when the receiver is switched to the "HTPC" channel, the TV monitor object comes alive in Windows (it is not listed as connected otherwise), and it is now the primary screen - where the taskbar etc. resides. I can then start XBMC to watch stuff. All good.