Hi Max!

@You : "...The icon should be specified inside a node file as a base64 encoded string parameter.
Check this file: http://moi.maxsm.net/nodeeditor/extensions/octane.js"

Thanks a lot for the info.
Last question...
Which size and format the icon should be ? Png 24 bit (8red,8gree,8blue with transparent background) as we talked about months ago ?

Thanks.

Ciao.