Modding a .guikit?

Hi guys. I just got a mac (and Shpaeshifter and themepark) and wanted to mod Cerebro... The thing is, I want to edit it, and I can't figure out how to make ThemePark let me do that....help please?

#467690

apply the guikit and open themepark, navigate through and change the elements you want. merge with existing elements and export as guikit

#467693

how do I navigate through? (sorry, OSX newbie)

#467703