Simon Browns plugin pack here
1) make sure you have the AnimGif.dll out of Simon Browns plugins pack saved to your
Local Disc - Program Files - Paint.net - File Types folder.
2) now follow Punkins tutorial and make your layered file
3) click "Save As" and choose animated gif - .agif as your file exstension
4) now a menu pops up similar to Punkins where you can adjust "delay" and "repeat",
experiment and choose what works best for you click "ok" when done and your file is ready.
5) now go where you have saved the file and rename it from .agif to .gif file
for example from test.agif to test.gif
And now you are done and can check how the gif file looks with your internet browser .