The secret to HDTV using a VGA connection

Took some trial and error, but I discovered how to get HDTV on my Toshiba 40" LCD TV using the VGA port.  I thought I post here to save somebody else the trouble.  Here's all you need to do:
1)  Set your computer to drive the external monitor at 1280 x 768
2)  Use the TV's remote to select PC as the input, then use the Pic Size to select Full Screen
This worked with a Toshiba 40E220U to fill almost the whole screen (I've got 1/2" black space at top and bottom) with 16:9 ratio high-def.  Looks like I'm getting about 720P quality HDTV.   Per the user manual, the TV supports two higher res modes thru the VGA port (1280 x 1024 and 1360 x 768) but my PC graphics adapter couldn't drive the 1360 x 768 and the aspect ratio was wrong for 1280 x 1024.
FWIW, the PC I am using is an older Toshiba laptop with ATI graphics.  I used the Catalyst Control Center to run the second monitor at the 1280 x 768 as an extended desktop, and then drug my browser window over onto the TV to run.  Works great w/ Netflix running in full screen mode.  Cloning the computer monitor onto the TV did not produce good results.

I want to use the VGA input on my Tosh 40E220U also. But I have some roadblocks.
Both the HDMI ports are occupied  [ Sat TV and Blue Ray ]
The Tosh TV is a second monitor on my setup [ for gaming ]
Originally,I set my ASUS Nvidia GTX 560TI Video card output to Dual Display.
One DVI from card goes to a 27 inch Monitor
The 2nd DVI from card , is 'adapted' DVI to HDMI and went to the Tosh TV HDMI input
Had 1920x1080 resolution on both Displays,,,, just what I was after,,,,,,,,,,works fine.
But I wanted to use the 2nd TV HDMI input for Blu Ray, so tried to connect  from video card using a M to M , DVI To VGA cable, connected to VGA at TV.
Both 'Displayed' ,, but the resolution automatically bumped down to 1360x768 on BOTH displays,
and the display on TV was cropped off on all 4 sides, it was fine on monitor, just lower resolution.
Is there a way to produce 1920x1080 on the Tosh TV using the VGA input ?

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