Mailbox folder permissions

Hi

I’m trying to assign a user to have owner permissions on another users folders in their mailbox. 

I don’t want them to have Full access to the mailbox just owner permissions on the folders.  As there is 200 odd folders in the mailbox I’m thinking it will be easier to run a PowerShell script to assign permissions to the folders rather than going in to each folder and assigning the permission.  Then I can go in and remove the user from the 5 folders I do not want them to have access too.

I have tried numerous scripts and have failed.

Any help on this would be great.

Thanks.