I’ve deleted the previous post that I just did about running multiple WordPress installations from the same set of core files. Seems it’s a little trickier to get what I wanted than I first thought.
If you’re still wanting to plug away at solving this, multipleblogsonasinglewordpressinstallation.com is still very useful. But also check out Ryan McDonnell’s post on the same subject, and read the comments.
In my now abandoned post, I did neglect the fact that WordPress was including files based on the
ABSPATH constant in my
wp-config.php, which I thought I could keep in one place with a
switch/case for database settings. Big mistake!
But, there were other issues too for me. So, given that 2.7 has auto-upgrade built-in, I’m making the decision to go and fry bigger fish. I might revisit this; if you’re trying, good luck!