Ok, so I changed the order of the
Option "ConnectedMonitor" "DFP, TV"
and made it
Option "ConnectedMonitor" "TV, CRT"
and on X server restart it displayed the login screen on the TV!!!! yay!
But not on the monitor!!! boo!
How can I get it onto both the TV *AND* the monitor, or else switch between them without restarting X? <ctrl><alt><[+-]> did nothing
Also, the TV was flickering a fair bit and when I tried to change the vert/Horiz refresh rates it got upset, and i had to use rescue mode to turn off twinview again to get the output onto the monitor.