I've been online since 1995, so I've been on many message boards over the years. I have always used a third party to store my photos online, I use
ImageShack Online Photo Hosting. That way the images are stored online and you can use them over and over at any site you please. Go to the Image Shack link and open an account. Then download your photos to your account page. Then when you want to post a picture, select the photo and copy the photo link. Then on any message board when creating a post, click the shorthand link for image and paste the image location. After you've done it a few times it's not as hard as it sounds.