Ahhh grasshopper very simple....

Click post.

Look up at the red writing.

click where it says "File Upload Enabled Click here to upload your file "

Pick what type of file you are uploading (jpeg, gif, html etc)

Click browse to browse on your local system for the picture. Here you have to use a little smarts and look at the bottom where it says "files of type". Change this to All Files (*.*)
Find your file and select it. Click Open. This takes you back to the window you were just in. Click "Upload File!"

You will get another window saying something like
File was successfully uploaded to remote server. The URL of this file is:

Highlight that link and right click -> copy.

Go back to the orginal window where you were going to post the message and paste that link in

http://www.calfishing.com/dcforum/User_files/3a245816618d8fda.jpg

The link will turn into the image when the message is posted.

Ok I guess that wasn't so simple, no wonder you asked. I do it a different way where I ftp the file directly to my site but from outside you have to follow the procedure above. Hopefully that helps.

-Rob