Re: multiply buddypress installs
@Bercy Just install your WordPress MU in a different directory; create a new database, preferably with a new user for security and you\’ve got it working …
With a fresh user and database you won\’t be overwriting your existing bp\’s.
If you want to use the same userdatabase and share it serverwide, use the same database but change the prefix per buddypress installation.
Hope that has answered your question with virtual hosting & wordpress ..
I wish it was as easy to migrate existing data towards upgraded BP\’s 
