How to disable a thirdparty update?

Hello,

This might be easy question, but I am having a difficult time finding the answer...

It turns out that Open Office 4.0 will add 50 megs to each roaming profile user on the domain. I have already scanned and have been unselecting the patch from being pushed out. Is there an easy way of removing this update from getting to all machines?

Any suggestions would be helpful.

Thanks,

Robin