go to help section.... its as easy as 1...2...3
Have it running in two windows so you can flick between the help page and the forum you post in.
You have to upload the pic first. can't do it from your desktop/my documents
go to reply message, then to help, copy the thing and delete where it say adress or w/e and hit back past that into the box, and replace adress with the url that you got from the picture off the internet.