Me seems the tweak author in this thread missed one essential step. Apart from the presence of the desktop.ini file the folder also has to have the "system" attribute.
Easiest way to do it is right click the folder, properties, customize, change the icon. If you like you can change the icon back later but we now have a desktop.ini file inside the folder and the folder has the required "system" attribute.
Now add these lines to the desktop.ini
[{BE098140-A513-11D0-A3A4-00C04FD706EC}]
Attributes=1
IconArea_Image=P:\ath\to\your image
IconArea_Text=0x00000000
The last line determines the font color of the file names (for example 0x00000000 = black,0x00FF0000 = blue,0x0000FF00 = green,0x000000FF = red,0x00C000C0 = purple )
Alternatively you could create the desktop.ini from scratch and use the attrib +s command from a command window.
[Btw. describing this tweak had been my very first post at ntfs.org (experience.org then) long time ago -- memories

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Leedog, sorry can't help with your tweak request. Don't think it is possible, but who knows...