James
>>This is just a thought, but would it be possible to have a "Copy & Remove" option (or "Cut" in Adobe nomenclature)?
I added this function today morning.

>>The only things that would fit the description that I can see is: "NEW","LOAD","SAVE" etc. but they have not been removed.
In v0.96 and earlier versions the icons was stored in /imgs directory as png files. In v0.97 this directory has been removed. Now NE engine draws icons automatically every time you you run it.
Now you can change color of the icons in colors.js file.

Marco
>> want to start with a simple thing and to see how it works. Something like this (please don't care about colors or icons, are only examples)
It's OK. Looks good. I'll make small change in init.js (or index.html) today, so you can add custom buttons and windows without making any changes in the core files.
I'll send you an example today evening.

>>I think it's easily feasible for example assuming " icon file name.png = node name". Icons could be placed into a folder inside the root of P.E.
Huge amount of separate png icons will affect on overall engine performance. Especially when you open NE window.
The better and more clear way is store the icons inside every node as base64 encoded image.