Change 1D2 Focus Screen

I have read that you can change the focus screen on the 1D MKII, but how does one go about it. I can't find any reference instructions in the included manual.
I dont plan on changing the screen right now, but I do have a couple small specs on mine that I would like to blow off. So I figured if it's easy to remove...

take off the lens and look into the chamber (where the mirror and sensor are). on the top, you will see a small metal tab. if you push that tab a bit, the screen will just fall and you can change it... takes about 3 seconds

Hehe, thanks blonde!
I can't believe the manual doesnt show that, or if it does, I didn't see it.
Btw, because the screen is so accessible, I was able to blow the marks off easily with the rocket blower

its great isn't it? i was shocked to realize how easy it is to take it out...

Yes! With the 20D, if you got dust or something on the focus screen, it was semi-permanent

When you buy a new focus screen it comes with a tool to remove the old focus screen along with directions that include a lot of pictures. It is very easy to do.
With some of the focus screensyou may need to change custom function 0. It is all explained in the directions

speaking of which, does anybody have some good recommandations for a new screen? i mostly shoot wildlife and birds so i am not sure that i even need a new one but if there is something better out there than i am interested...

I have the EC-B screen installed in my 1D.......easy to do and the screen has the split-prism in the centre which really helps with manual focus. I am going to get one of the newer ones soon which has the 'rule of thirds' lines imprinted. I think that would be useful for composing......