1) Open an account at photobucket.com (free)
2) Upload your photos there.
3) Once the photos are uploaded, you can copy and past them into your post here. Under the picture listing on photobucket will be 4 lines of code. Select the one that looks like this:
[IMG]http://i20.photobucket.com/yourname/album/picture.jpg[/img.]
Copy and paste that line of code directly into your post and the picture will appear.