[Hornstar]

I have just bought a second vbulletin, I will buy a third if this will work.

I have three different domains all on the same server. www.a.com - Main site
www.b.com and www.c.com

I want to have the main sites data with User, PM, and sesson data. to be shared with the other 2 sites.

Now if a new user signs up on www.b.com will that users info be inserted into the database for www.a.com ?

I'm just not sure on one other thing as well. Is it possible to lock out the config.php from being read except for the sever and myself when i log into ftp, because I run www.a.com and my friend runs www.b.com and I dont want him to know the user and pass to the mysql database and to have access to the database at all, as if I was to lose it, that would be seriously bad lol.

Just wondering on the security wise of this issue, thanks.