Options in Tridef/iz3d for 3d

You can do this by turning on red/blue 3D mode in the drivers and getting a pair of the colored glasses that you found in comic books from the 80's. It looks terrible and barely works, but that will give you 3D on a 2D display. Anything else and your display won't tell your 3D glasses to turn on and work, plus you'd drop to a really juddery 30fps per eye which is the primary reason this didn't catch on the last time 3D shutter glasses came around.

Your TV still wouldn't know to kick in to polarized mode.

I have a similar Vizio and asked myself the same question because although I love my M3D550KD it is not top of the line and the 3d aspect, specifically the processing, is not as good as my HTPC and when my tv is in 3d mode I cant control certain aspects of visual settings, it slows my pc down quite a bit, etc. Everything I read said it couldnt be done so just for the heck of it I took a movie clip, put it in Adobe Premiere and by using multiple layers of the same movie I was able to recreate the same thing you would see when you take off your 3d glasses and the picture is off or blurry. It worked, but the file was giant, it looked like junk, I couldnt control depth or distance and so unless you want to do that with every movie you want to watch on your Vizio your probably out of luck. Sounds like this is the same concept as DarkLords suggestion.

On another note, like your issue with gaming being turned off, I had a problem with HDMI and my Nvidia card and long story short I did some EDID edits and essentially fooled my pc into enabling something that normally wouldnt be enabled in that mode. I am sure you have double checked, but are you sure your tv is supposed to disable gaming mode? I have 3 different Vizio 3d tvs (family included) and none of them do this. Have you tried RGB vs HDMI vs DVI connections?