I can help this one!
You need to post it on a site like Imageshack, Photobook, or Tinypic (Tinypic and Imageshack don't require you to register, and on Imageshack you can upload multiple sprites at once). You see the bar at the top of the screan with the http://urlhere.com
etc.? Well, after the sprite(s) load, if it is only one, click on a link that says something like 'Full size image' and you should come to a page that only has the sprite. Copy the Url link, and post it on a post on Pe2k, and post [IMG]urlhere[/IMG] on the sides, or click the picture of the mountain and paste the link in there.