Hey Chris,
It's not that hard really. When you start a new topic you get a screen that includes a text box, a bunch of emoticons, place to enter your username and password, etc. If you look under the "Password" box you will see an option to "Upload your files".
Select this and a new box will pop up where you enter your username and password and then the path on your computer where the pic file is located. After you have located the right file, click on "Upload Now" and wait for the upload to be completed.
You will then be taken back to the text box screen where you now click on "View/Delete/Get Upload Code" option. Click on "View Files" and a list of your uploaded files appears with HTML code that can be cut and pasted back into your original message in the text box to make the picture appear in your post.
It's a little convoluted, but not that hard. If you need more help give me a call.
Gary