Well I've searched, but with no hits, I get to ask

Has anyone tried to use DVE via the xbox360 on VGA? This is on a new HLS6187. Mine will not let me change the sharpness and tint settings nor will it let me turn off DNR (I'm guessing that's a function of the VGA input).
I've gone into the service menu and set the gamma to 0 (after writing down all the settings, and taking digital pics/movies of each screen

) - I noted there DNie demo is set to on (didn't change) and there is also a Dnie on/off which is set to ON (also didn't change) - I presume both of these can be set to off, but wanted to check first.
I guess I can check to see if my settings stuck by going back in, but figured I'd ask instead of using a lmap cycle - I presume the the service menu settings are saved just by exiting. I merely turned off power to exit and waited for the fan to turn off. later I read that you have to hit mute twice then power, but don't know if this is correct.
In the tech wiki, I saw that eliab recommends turning CCA to off prior to using DVE, however, there is another post saying to use his "base" settings and then use DVE. I left CCA on. And went with the second option - is this correct?
I've also read about how some people are "closing" down the iris, but didn't know if there was a consensus about this (not to mention I can't find the setting - I think it's Lamp control, but i ain't messing with it).
I've found that the cabinet is really wobbly, but I need to run back up to CC and check their floor model to see if mine is more than expected.
I watched Superman returns on HD DVD on the 360 via VGA, and there seems to be a fair bit of noise in the dark areas. Using DVE I have brightness set to 38, and contrast had to be bumped up (although I'm not sure if I'm setting this quite right). I had it set to 70, but I backed it back a bit. I'm going to run it over component and see if there's a difference (will report back)
Last question - how long should you break the TV in for before having it professionally calibrated? I'm planning on having umr do it as I'm in the Dallas area.