There are a few ways you can post a picture on the forum.
One way is to Upload your pics to a site like photobucket or tinypic.com. Take the URL they give you (the link to the pic u uploaded) and it paste it in the IMG code prompt...just click the IMG button in the reply box area and past in the URL there.
Or, below the reply box is a browse button, you can click that and find the pic on your computer and hit Add this attachment...to add more than one pic this way just click browse again and locate your next pic.
Its easy stuff, but if anyone has any problems doing so just let me or anyone else know and I am sure we can help.