You can use some of the image-hosting sites.
I don't know which ones are best since I'm using them very rarely and I use some Croatian site, but you can try
http://imageshack.us/ or wait for someone to come up with some better one.
Basicaly, on the site you just upload picture and when it's uploaded there should be a forum-code(or something like that) which you copy and paste here in your post.
