[mythtv-users] Scaling/overscan config options for pvr 350 (tv-out)?

[Dan]

Now that I finallly got myth/ivtv up and running correctly on the tv.
I would like to adjust the size of the mythTV UI.  Essentially the width, and height of the UI is coming out 
bigger then fits on my TV.  I see in the config settings you can adjust the X/Y location, but not the height/width?

Is there a way to do this? either in myth, or the XF86Config settings for card?

Any pointers to related emails/faqs, greatly appreciated.