Guests to see everything but posts?

Just wondering if it is possible to make it so gusts can see like catagorys and forums but not the actual posts? I have made it so they can only see specific ones but they can still see posts can this be changed?

yes set the guests permissions about a category or forum ''view the forum ''

but no ''read the forum ''

Can you explain exactly how to do that - I can't find where you can change the permissions on guests.
Alternatively, if you could tell me how to adjust a group to 'see' but not 'read' would probably work better for me.

Thanks in advance

i believe this tutorial can help you there. try read it Here

I had read that already, it didn't really help me do what I need to

Maybe setting on 'Private' might do it 'cos I want someone to start with nor access and then set what they actually have access to.
BUT I can't work out how to set it on private??