Well, it's easy enough to make them for Linux: just make a png. I dunno about Windoze's .ico, though.

EDIT: Just realized, the method you use for replacing the icon: does it work for you? Typically, that shouldn't change the icon. You need to have an item with your icon on it, then copy&paste the icon in the information window.

It work for me, big time. It is made on and made for a Leopard, so I'm not sure if it will work on Jaguar without converting the icon. Just simply replace the icon. That all there is to it, but note that it doesn't replace the icon in the dock. To solve this, just drag it out, find Sauerbraten.app and drag it back in.

I converted it to .ICO on my machine if anybody wants it for windows.

5 Stars.

Just one question, is this a model?

if you can please make this for windows

Just convert it to ".ico" format. Here is it for you ;) Ico file here
PS : I'm on Linux, i converted it with GIMP

thx =)