Hey Matt,
Do you have an ISP that allows you space on their server?
If so, do you know how to upload to it?
As far as posting full pics on the forum... at least the way I do it is upload pics to my personal webspace at my ISP.
Then I type my message on the forum like I am doing now... I like to 'go advanced' mode so I can preview.
When you want to insert a pic that you have already uploaded you simply click the 'insert image' icon above where I am typing and paste in the internet address of the picture. I do this by opening a separate window and go to the pic I want to import. Then I simply copy/paste the address in the 'insert image' pop up window.
Then you can preview your message and format, add text, etc. I hope this helps.