Question : Debian (Xebian) Linux FBSet: How to adjust image?

I'm reinstalling Xebian on my XBox (don't let that intimidate you... I got it working in HD almost perfectly via the Component Video cables!)

Anyway, while in beautiful crisp HD, there is a bit of overscan (the image is too big for the display) and I need to know what parameters in FBSet to adjust to shrink it down, both horizontally (maybe 20px off the left) and a little vertically (maybe 6 px off the top).

I'm just not sure if I need to adjust the timings, virtual resolution, or resolution? When I run FBSet I see the data in the <code> window typed by hand (can't figure out how to copy to clipboard from eterm and xterm). (Also: is what I'm using 720p or 1080i or neither? What's it closest to then? I'm not really sure and I'd like to know...)

What should I tell FBSet to try?
P.S. - I get one shot. If it fails I have to reinstall.

         
          cpuname:/home/live# fbset

mode "1280x720-60"
    #D: 74.256 MHz, H: 45.003 kHz, V: 60.005 Hz
    geometry 1280 720 1280 720 32
    timings 13467 220 70 22 3 80 5
    rgba 8/16,8/8,8/0,0/0
endmode

Answer : Debian (Xebian) Linux FBSet: How to adjust image?

...no clue what that means...

Ok... here's how I just got it working.
Main guide & inspiration: http://www.xbox-linux.org/wiki/Xbox_HDTV_HOWTO#X11

With my Classic XBox (Xebian Linux) and 32" Sova TV...
(1) Got FBSet code working in /etc/fb.modes (executable via fbset 720p)
<See code window below>
(2) Found http://www.arachnoid.com/modelines/ <-- This is what I needed as an answer to my question
(3) Played with the modeline in multiples of 8 for the values shown below of 1384 1648 and 1698 in /etc/X11/XF86Config-4 until I reached the proper horizontal fit...
Modeline "720p" 1280 1384 1648 1698 720 723 738 750 -hsync -vsync