Facebook - I have created a Group.

The Group is for everyone in my graduating class of my university.

I am not (Facebook) Friends with all of these people, obviously. But I can find each of them in the Friend Finder.

I want to invite all of them to join this Group.

But the Group invitation feature only allows me to invite Friends, or else people who are not in Facebook whose email address I have. It does not let me invite the people who match my search in Friend Finder.

Also Friend Finder lets me ask people to be a Friend, or send them a message. But does not let me send at once to all of them an invitation to the Group. I cannot message each of them about the Group because that is considered Spam.

Is there a way to do what I need to do? Invite the results of my Friend Finder search to my Group?

Thanks for advice.