Go to http://photobucket.com/
and set up an account for yourself (it's pretty easy).
Then, when you are in, you'll see a big button on your page that gives you the option to upload a pic. Click on that, and choose the pics that you want to upload into your Photobucket account. They may take a few seconds to upload (i tend to compress them 1st in Microsoft Photo Manager . . .but don't worry about that if you arent familar with it).
Then when you click back onto your page after you have uploaded your pic, there should be 4 boxes below each pic, that say something along the lines of "Email & IM", "Direct Link", "HTML Code", "IMG Code" next to them.
Right-click on the box that says "IMG Code", and copy that. Go back into your post on here that you are trying to make (i tend to have two sets of internet explorer open at the same time to make this easier), and paste the link where you want it into your post.
Give it a try . . .any issues, send me a PM & i'll help you where i can.