[Pharo-project] Where I commit changes to AutomaticMethodCategorizer for example?

Hi. I am trying to work in the Pharo 1.2 but I an finding different problems. For example, AutomaticMethodCategorizer uses Preferences, and I need to update it. The project has global read in squeaksource, thus I cannot commit. In addition, I don't think Diego will let me commit that as I will break the code for squeak (ok...I can add Smalltalk at:Preferences ifTrue...but that's crap). So....what do I do ? I commit that package in Pharo repository? PharoNonCore? thanks Mariano