Jack,
I've just also noticed that there is a drop down menu that you can choose the size of your pic without having to resize it.
Btw, the code that you need to link to is not the thumbnail but the actual 640x480 pic
This would be the physical address:
CODE
http://img479.imageshack.us/img479/773/jp0556fj.jpg
Which when enter on the image tab on JeepTalk it would look like this:

Admin