If I understand you correctly, you want VISITORS to be able to see thumbnails of featured members. I can see why you may wish to do this because it makes people realise that the site does have real people as members.
Before you do it, you may wish to consider the ramifications. Visitors can be anybody and some may not be desirable. Depending on where you live, privacy laws may require you to warn members that if they are featured, there profile photos will be available to the public. Some, if not all may not be happy with this, so warn them anyway.
Provided all is okay, you should be able to manage this. Please understand that I'm doing it from memory and I could be wrong. Therefore, always practice on a test site!
- In admin/builders/pages builder go to Home Page. Look for the Featured Members block and if inactive, place it on the page. Open the block and set it for members and guests, or just guests if you want to hide it from members.
- Go to the Profile View page in pages builder. Set ALL blocks to members only or everyone except guests.
- Go to admin/builders/navigation menu and set all Main Menu headings to Members Only.
- Provided I've got it right, all the guest will see is a list of featured members, but when they click any thumbnail, they'll be told they don't have access to the information.
This is the wonderful thing about Dolphin. The permutations are endless, but you have to figure them out yourself. A concise manual would be thousands of pages thick.
Love the script - we're trying to keep it alive!