I've done this before with MovableType, but can't figure out how to do it with WordPress.
I want to have a php include which calls the file that posts are being written to in WordPress, which is installed in another directory. This has a number of benefits, but doesn't work because the WordPress index file just pulls the post live from the database it seems. If you do a php include, it can't pull them correctly as it's in another directory.
With MovableType, I can just setup a "new template" file, and then put in a few MT tags, and tell it where I want the output file. Then it makes an outfile with actual content, and not php commands.
I sincerely apologize as I know I am not communicating this properly, but hopefully someone will get it and.. help :-).