<img src=" " height="150" width="150">
Post the above text in your reply window.
In between the quote marks goes the complete URL of the image. This can be obtained by right clicking on the image and selecting "properties" from the drop down menu.
Copy and paste the address to the space between the quotes.
The two numbers that appear for height and width are just that. Height and Width. Adjust these numbers until the image appears as you like it.
Click on "preview" to see how you did.
Freep mail me if you'd like some more pointers.