Ubuntu Multimedia :: Zotac Zbox (Intel GMA3150) HDMI To TV Overscanning

I am not sure what to do about my problem so I am making a post. I will point out that I am kind of new to linux, but I understand the basics of command line operation and such, which is why i didnt post this in the beginners forum. I bought a Zotaz Zbox SD-ID12-U, linked below, and am having annoying troubles with the HDMI connection to my TV.[URL]...I have installed Ubuntu 11.04 via USB DVD player -- everything seems to be working except for this. The issue is that through HDMI at 720p it over-scans about 20 pixels on all four sides of the tv screen. In the "Monitor Preferences" it lists only 3 resolution options, all of which have the same overscan issue:

1280x720(16:9)
800x600 (4:3)
640:480(4:3)

The device has an Intel GMA 3150 on it and when I run "lspci | grep VGA" the output is:00:02.0 VGA compatible controller: Intel Corporation N10 Family Integrated Graphics Controller (rev 02) This problem does not exist when I use a VGA cable, which scales the screen properly for a variety of resolutions. I prefer to use HDMI so I would like to resolve this issue. I have looked through the forums but am kind of overwhelmed with this stuff and really dont know where to begin.