ok i solved the first problem. i removed the line:
Option "ConnectedMonitor" "CRT, TV" from XF86Config
and i have output on crt and tv.
but still the tv is only showing the top left part of the desktop.
looks like it displays 800x600 pixels from the top left of the 1280x1024 desktop.
is it even possible to run twin view with different resolutions while still displaying the full desktop on both devices?