Another PhPBB Thread

[spinaldex]

So, I've read the few PhPBB threads that basically state that it's an incredibly difficult/time consuming task because of how PhPBB was designed (templates).
I have an alterate request/approach though (although I'm a novice so maybe i'm full of it).
PhPBB uses a file called Page_Header.php which builds the HTML for each page when you view it. What about modifying it with the code you need to display a Calendar in it, so that when you create a new forum post, you can embed the calendar in the post? I have already modded the forums to accept HTML in every post, so do you think might work? I want to see if your forums will work before I purchase them so I'm hoping this might provide a better method. Otherwise, I'll have to use one of the free calendar mods for PhPBB that I don't like nearly as much.