Trying to get smoothness

I posted this in the Avsim FSX forum but didn't get much luck, I have recently been flying my PMDG 777 and found that it is simply unplayable at the FPS I attain as opposed to what I am trying to attain. My monitor is a Samsung 22" LCD set at 60hz refresh. I can achieve 60FPS in flying situations but on the ground, 30-40 is pretty much what I see all the time, this sounds good but on my screen it looks like a slideshow, especially when it drops <30, that is when I just close the sim in frustration. I have read about the 1/2 refresh rate tweak which I guess gives smoothness at 30FPS, ideal for me, if the sim was to be smooth then running at 30 is not a problem.

My problem is I simply cannot effectively apply this setting, I have set it in Inspector and I get rock solid 30FPS at all times using no frame lock at all, there are no fluctuations and my FPS never goes below 30 at all but the screen is simply not smooth, it is like I have artificially limited performance and things look like a slideshow. Is there something I am doing wrong with this tweak because I would not call 1/2 refresh at 30FPS smooth at all? The only method of achieving a smooth and happy sim for me is running at 60FPS but that is pretty much impossible with the PMDG 777 and other additional addons. I have even removed autogen, AI traffic and sometimes scenery BGL's just to try and facilitate that higher level of 60FPS.

I have attached an image of my Inspector, is there anything I can do to make this sim smooth without trying to achieve my refresh rate in FPS.