Well the way I do it, is first I save the image to my computer, then I upload it onto photobucket.com. Then, when that's done (should take a few seconds), there are four boxes underneath the image in your gallery. Next to them, it says 'Email & IM', 'Direct Link', 'HTML code' and 'IMG code'. Click on the box next to where it says 'Direct Link' and the link will be automatically copied. I then go to edit profile from my homepage and go down to 'About'. Press edit at the right side of it, and then paste the code of the uploaded image you want into the text box, and then, highlight the text. Then all you have to do is click the button with the letters 'img' on it at the top-right of the edit box with the rest of the buttons that help you make the text bold, underlined, etc. Then press the Submit button and the picture should appear on your public profile page under your age, gender and hometown.
The Star Trek shoop da woop thing i randomly found on the internet ages ago, feel free to take it. The achievement thing is a generator where you can make your own achievements. go here to generate your own. Here's another I did.