I am curious of one thing. How come the developers of phpBB2 not make it so that when the users click on the buttons for the html tags such as "B" "i" "Quote" "Img" it would pop up a window for the users to type in the text line instead of having the users to insert the tags in the middle of the tags or that they have to click on the "Close tags" link.
You do know that you can just select the tags (i.e. highlight them) Then you click the bold or italic tag button, and it will throw the opening and closing tags around it. This is just as easy as what you suggested, but simpler and easier to understand. 8)
You could also do the way that you suggested with templates (it would still show the tags in the post though). Good Luck