I know it's probably very simple but I'm an idiot and need it spelled out. I would just try and attach them but I don't appear to have a "browse" button on the composition page when typing a post.
Click this and a input popup window thingy will popup asking for the url of the image. or just type Code: [ img ]http://blahblahblah....(the url of the image)[ /img ] without the the spaces in the [ img ] and [ /img ] hope this helps. ... or are you asking how to upload the picture to the web? Just upload to Imageshack. It's free. http://www.imageshack.us/ It has the browse button thing. After it is uploaded, it will give you the url. I think its the very last one on the page. They give many different types of urls for the image.
I still don't know how to do that. What if my picture does not have an url? what if all I want to do is upload directly from my Comp?
The best bet is to download imageshack: http://www.imageshack.us/ As you can see the browse button allows you to host pics on your HD on the website. It gives you the URL after you have hosted it. Now once it is hosted, you will have many options. If you want to show the image directly (see example below) in your post the last link which says "Direct link to image" is the one for you. Just use the image button in the post box and use that URL. I hope this helps.