ok, with my 'latest' script..
Make a Directory, give it a name (probably images)..
chuck all your images in there, then edit the following:
$target = getcwd() . "/images";
replace "/images" with your folder name.
If you want to use an extention which isnt in the list, change the following line
Array("PNG", "JPG", "GIF");
to
Array("PNG", "JPG", "GIF", "EXT", "EXT2", "ETC");
then just call the php file in a browser, and each time you refresh, you should get a new random image.
Then use the BBCode IMG tag, and point the URL to where your php script is, or use an <img src='http://your.domain/path/to/something.php'>
(something.php being the script filename)
and it should work..
(If you wernt being sarcastic about the explanation thing, i appologise
)