I can do good screenshot icons. If you want me to make an icon, just post the model in the Pastebin and give me a link.
If you want to do it yourself, but can't make good icons, you can just use Warcraft 3 Viewer and Button Manager.
Here's my method.
Stuff needed:Warcraft 3 Viewer, Button Manager, Irfanview.
Method:
1.View model in Warcraft 3 Viewer.
2.Remove cameras, axis, change background to black.
3.At an appropriate angle, take a screenshot,
4.Use paint or Irfanview to cut out the unit in the screenshot's head(if it is a unit icon), then CnP it in Irfanview.
5.Adjust the size to make it 64X64.
6.Use Button Manager to make the icon.
Here's an example:
Wolf Icon