Settings for Canon EOS 450, Adobe Camera RAW, PS CS 5 and printing photos

[avz10]

I have a Canon CS EOS 450, have used PS CS5 in the past. I have now been made aware of Camera RAW and have started using it. My problem is that the images varies when I open the photos in different programs. My laptop is a HP Probook, 64 bit, Windows 7, etc.

So, my question is about settings on the different devices; Camera and programs:

1. I shoot in RAW, so I believe no change in camera settings.

2. Adobe CR- I use white balance, contrast, clarity, and vibrance. Any programme changes on ACR programme necessary (ie colour, etc in the programme to match with my screen?))

3. Biggest difference between moving from ACR to PS CS5- usually a big difference between these two (colour; sharpness)

4. And what would be the best proramme to use the photos that will look as close to what I will get if I print these in photos?