I was wondering if it's possible to create new toolbox items in PE? I have been searching around and have not found any information on how to do this. For example, I'd like to add a "Custom" category (what it's called in the XML files), and then in this category, add blocks for an RGB LED driver that I have working in I2C blocks. Rather than copying and pasting functions between projects, it would be swell if I could just have custom toolbox categories at my disposal. Any information on how to do this would be greatly appreciated!