Hi,

Is there any way I can stop moderators from deleting/moving some topics?

For example, I have a guestbook Forum with a guest book topic. I want the moderator to be able to delete postings but not move/delete the topics.

Is this possible?

The easiest way is to tell the moderator not to touch the topics.

It's supposed that you trust in the persons you are giving moderator's rights.

If someone has not the needed behaviour, you can remove him from the moderatos' list.

tchurch
There is no such built-in ability, but it's always possible to order custom things like this paid way.