Hi there,
i feel bad about what i just discover, to add a new toolbar icon, i need a DAT file !
Someone can explain the strategy here ?
i try to look at any app that can convert/create such icon type… nada !
ok, i saw the video about Campbell creating those icon, using a python script, directly from blender… but, wait a minute… is that the only solution ? seriously ?
please, tell me that i miss something here… i dont want to create a 3D button, i just want to draw a flat button.
hope someone will be at the same point than me, to have a discussion on this topic 
bye, have a great day
uriel