Community Forum installation

I'm planning to add Community Server to my existing site.

My existing asp.net membership tables have data in them - mainly details on registered members.

I see that Community Server uses the standard asp.net membership provider database structure.

What I want to do is find the easiest way to add Community Server to my site without ending upwith two separate login proceures. (One for my site and one for the Community Server based forumswithin my site.)

I'm wonderingif I overwrite myexisting databasewith the community server database will it delete the existing members?

Anybody got any helpful suggestions on this?

Thanks
Ken