You can upload a picture directly from your computer to a post as an 'attachment'. Pics must be 800x600 or smaller and 100k or smaller in size.
When you create a new thread or reply to a thread there's 'Additional Options' at the bottom (if you don't see them maybe you did a quick reply in which case you need to click 'Go advanced') and there's a button labeled 'Manage Attachments' and by clicking on that you can upload your picture file.

You can upload your pictures to another web site (like photobucket which is very popular), and then put the address (URL) of those pictures into your posts. This is better than attachments because you're not limited to size (although huge pictures over 1200 wide are not welcomed) and you can put the addresses of multiple pictures (vs. 1) in a single post.

After you've uploaded your picture to another web site, get the picture on your screen (maybe in another browser), and copy its address (URL) as follows:
Firefox - right click on the image and select 'Copy Image Location'
Internet Explorer - right click on the image and select 'Properties' and copy the address of the picture by highlighting it and right-click/copy or Ctrl-C.

Method3: Using the Club Lexus Photo Gallery Click here for tutorial

Then in your post/pm browser you can paste the the picture address between img tags like this:

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