Sofian J. Anom posted on the forum topic Wordpress and Buddypress same password in the group How-To and Troubleshooting

@B1gft — This link might help to create a multi installation wordpress with a single login:

http://techblog.touchbasic.com/html/single-unified-login-for-multiple-wordpress-2-8-installs-in-subdirectories-using-cookies/

But I’m not sure that there is hosting that does not support Wordpress multisite. Even free hosting I have ever tried allow…[Read more]