Use a file host such as TinyPic - Free Image Hosting, Photo Sharing & Video Hosting (
http://tinypic.com/)
Click the CHOOSE FILE button and find the image on your PC.
Double click the image you want to add (it's easier if you have it on your desktop).
Click the green UPLOAD NOW button on the tinypic page.
Fill in the hateful captcha and click the green button again.
Then copy the IMG Code for Forums & Message Boards link they give you and paste it into your post here. It will have and html address inside image tags, like this:
It's a lot simpler than I made it sound. :p
---------- Post added at 06:49 PM ---------- Previous post was at 06:43 PM ----------
Alternatively, you can link from the image itself if it's on another site and not your PC.
Right click on the image and choose to copy the link address, then paste that into the image tags.
[IMG]picaddress[ /IMG]
(Note: Remove the space I have left between the [ and the /IMG] or it won't work.