PS CS ACR does not work with 1DsMkII yet. They apparently have a beta version out for testing, but not for public consumption.
I don't feel like trying it for 1DsMkII, but ACR could be hacked to add 10D without issue by changing D30 into 10D in the hexadecimal language. This was easy to do because you did not change number of characters only their meaning.
Two reasons why it may not work is sensor size difference between 1DM2 and 1DsMkII and name requires more letters. Then again it might, if you only have the one camera and can live without the ability to access 1DM2 images until Adobe fixes it properly.
All I know is it does not work yet. And blame Canon before Adobe in this case (although Adobe gets a bit of the blame for making us wait more then a couple of weeks)