Tony, once you post an image in your gallery all you need to know is your gallery number and the title of the photo. By putting my computer cursor on the camera icon in your most recent post I think your gallery number is 9813. Computerworks can probably confirm that for us. Assuming that is the case, to post a photo you would just type the following:
[img]http://www.clubcobra.com/photopost/data/500/9813imagetitle.jpg[/img
I left off a close bracket ( or "]" symbol) at the very end, so that the photo server wouldn't attempt to pull up a photo when I typed this. Other than adding that last bracket, where I have typed "imagetitle" you would just insert whatever file name you've given to a particular photo in your gallery, with no spaces separating it from your gallery number, and it should pull the photo right out of your gallery...
For further illustration, my gallery number is 10349. I have a photo there titled "scarab1". If I type the following (again, I'm leaving off the last ] symbol for illustration), it will pull that photo out:
[img]http://www.clubcobra.com/photopost/data/500/10349scarab1.jpg[/img
Now I'll type the whole thing and throw in that ] symbol: