Well if you want us to install it you can purchase an install service.
I am just saying that since your site is locked and we cant see it then its hard to give advise
Example if this is a standalone install with no forum integrated with it the photopost usergroups tables should have these entries
Content visible to verified customers only.
I am only guessing here on what you need to do since I am not able to see the site but if you deleted your usergroups then you need to reinstall.
Now for example you want a group to see a category and not regular users you would need to create a new usergroup first after you make sure you have all the default ones. Set permissions for that group under edit usergroups then assign users to that usergroup. You then go to edit categories and create a category and assign say only admins and that special group viewing permissions. then only users in that one group and admins are going to view that group.