Hi guys, it's my first post here, my UT50 is on the way

I'm a little bit confused about anikun07's calibration settings...
It has 3 modes, Cinema, Custom and Cinema 3D. When should I use custom instead of cinema?
I can save those presets and choose between them right?
I mean, I don't have to do it all again if I want to change from Cinema to custom?
Last question; I really want to calibrate the color temperature settings... I can't live knowing that my TV can have a better image

So... I know that I should take care while in service menu, but it's that hard?
Can someone post a little tutorial on how to use the service menu?
I know how to enter it, and I know how it looks like but i never used it.
I read somewhere that I need to change the mode i'm calibrating (number 7 I think), and use the number 1 to 4 to go through the menu pages, is that right?
I will use the channel button to get to the value and the volume to change it?
It might sound obvious, but i really don't want to change some value by accident...
Sorry for bothering, thanks!