[openbox] Custom Icons

[baby turtle]

Many of us use lots of terminal based apps (vifm, mutt, vim, etc) and 
also other apps which don't come with a set icon.
When using the task list to Alt-Tab switch between these apps they all 
have the same "default bland icon".

Would it be possible to add a feature to customize these icons? eg:

<application name="vifm">
   <icon>/usr/share/applications/folder.png</icon>
   <maximized>true</maximized>
   ....
</application>

Thanks.