This how I do it....
Posting Photos on Model Cars Forum
1. Post the picture you want to share on an existing website like geocities, yahoo pictures , etc.
2. "Copy" the URL of the picture on THAT site so it will be in your 'clipboard'
3. Write your PM and where you want to post your picture :
click on the "IMG" button
"PASTE" the URL you copied above
click the "IMG" button again
Hope this helps.