Check the FAQ page by clicking on FAQ at the top of the page.
There you will find the following info:
How do I add an image to my message?
In order to add an image to your message or your signature, you must have the image already available on a web server. This can be an image on your own personal web page, for example. To place an image within a message, simply use the following Markup Tag:
For example, if you have an image called cateye.gif and its available from your own website at
http://www.mywebsite.com/pics, then you would use the following image markup:
You can do the same for your signature. Click the option found on any page. Then, under the Main Configuration heading, click on "Personal Information, email, password...". Look for the Signature box, and enter your desired information, including any images/markup as above.
Note: To keep the forums loading quickly for everyone, it is recommended that you do not exceed 35k for your image size.
Is there a limit to signature image size?
We ask that you keep your images relatively small. As a rule, please do not exceed 125 x 600 pixels and/or 35k for a signature image. This will ensure that the forums load quickly for all users.
Can I attach a file to my post?
If you have a browser that is Mozilla 4+ compatible then the answer is yes you can. When you preview your post you will have the opportunity to attach a file to your post.
Good Luck,
Rick