Windows 7 - change default dvd-program

I wonder how I change the default program for dvd's. Now, when I double-click the dvd in "Computer", Windows Media Player is started. I have powerdvd installed. In file associations it shows that .vob is linked to powerdvd. Is there a way so that when I doubleklick the dvd I want to play powerdvd is started.

I don't want to delete windows media player (I haven't found out yet how you do it yet).

Control Panel> Default Programs

Yeah, thought so (sorry if my English is bad).

Then I have a screen with 4 possibilities.

1) Set your default program: looks like it, but Powerdvd ain't shown there
2) Associate a file type or ... :Ok, maybe this. But which file type is used when I double-klick the dvd in "my computer"
3) Change autoplay: This is used when I insert a dvd in my computer (so this ain't it, I guess)
4) Set program access and computer defaults: If it's here, I can't find it. (custom: media player -> doesn't show Powerdvd in the list)

On your 4) go to non-microsoft and see if it's there.

What I read there is:

Enable access: Winamp
Disable access: Windows Media Player, Windows Media Center

When I do this:

1- Go to control Panel
2- Choose programs and feature (not uninstall)
3- CHoose Turn Windows Feature On or Off on the left of the screen
4- Find Media Features
5- Unmark "Windows Media Player"

When I do this, it works. However: suddenly Internet Explorer is removed :s.

My perfect sollution would be where wmp (and wmc) and IE are still there, but NOT standard programs.

I don't have Powerdvd but is there something in the settings for Powerdvd to make it the default?
Maybe this tutorial would help...Open With - Change Default Program

This might work as a work-around:

Have you tried:

Click Start/ Choose Default Programs/change Auto Play options

for DVD Choose: Ask me Everytime (if power DVD is not an option)

Then put in a DVD

you should get a pop up window now asking you:
Play DVD with:
(and a list of all capable programs)

If you choose Power DVD, check the box in the bottom left corner:
Do this everytime

Will that work for you?