Buddypress Multisite - Privacy, Pro Sites & New Site Registration

Hi,

I have a new install with Buddypress Multisite using the latest
* Wordpress Multisite 3.2.1
* Buddypress 1.5.1
* Membership 2.1.2
* Pro-sites 3.0.3
* Multisite Privacy

I am going through a big learning curve but surprised at how quickly everything seems to be coming together.

I have it set-up so that users join using the membership plugin and then one group of users can create sites using Pro-Sites. As all of my sub-sites are private I would like to remove the following option and have it set as default to No

Privacy: I would like my site to appear in search engines, and in public listings around this network.
Yes/No

Is this possible?

Thanks!