Or just install push recovery image thru adb and install custom android 4.0.4 rom already rooted by team eos...
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Yeah, I like the TeamEOS flavor of ICS. I can't guarantee it working on your Brazilian xoom, however, if you can use it, it is a great rom. It provides a very stock experience but with many more features that compliment Android 4.0.4 without bloat. There are both nightlies and stable versions, both get updated (when you flash newer versions in recovery) so you won't miss out on any new features. And yes, it is rooted for you.
Of course, there are plenty of other equally great roms from other great developers to try out in case TeamEOS's rom doesn't fit your needs (or if you get flashing-fever).
Just saying, I am not to be held responsible for any damage (yes, there are risks) that happens to anything because of this post.
Hope that helped.
Cheers