Leaving Wordpress Core Files untouched shared between multiple blog installation

linux apache wordpress shared

Try this inside-out approach. It is untested, but I think you could possibly get away with this strategy:

Create a wp-content-<hostname> folder for each host. You are going to use it in a minute.
Create a wp-config-<hostname>.php for each site (I am assuming separate host names). It should contain the database connection information as well as custom defines shown next.
A quick look through the core code verifies the use of constants like WP_CONTENT_DIR. If you can successfully define that in your wp-config-<hostname>.php file, then you are likely golden....except for plugins which assume that the content directory is always named wp-content.
Modify the original wp-config.php to require() the correct wp-config-<hostname>.php by examining $_SERVER['HTTP_HOST'].

With some luck, you will have multiple sites and databases running off the same WP core, but not in multisite mode.

CodeHunter