This is the way I post pictures...
1) go to http://tinypic.com/
2) push the "Join Now" button and set up your account.
3) Upload picture
4) When done, grab your code from the "URL for E-Mail and IM" box
by highlighting the code inside the box below and typing "Cntl-C"
5) Go back to your Summit Post reply site and PASTE that code in the message.
Don't forget to add the tinypic site in your favorites.