First of all lets go over the settings on the iMac:
When you open NFS manager, got to the share definitions (that's under the header NFS server). In the right screen you click on the + button.
Now you will see the name /Users underneath the header shared folders. Select this and click on the button select.
Now a finder screen will open. Just browse to the folder you want to share and select it. Click on the button select.
This you will have to do separate for all the folder you want to share.
Make sure the folders you want to share won't have a space in them. I had to change some names. For example I changed the name of the folder "NZB Downloads" to "NZBDownloads" This is because otherwise you won't be able to share them through NFS.
Now we need to enter the settings in the POHD
This is much easier than most think. Go to browser and than select NFS. IN this folder you have to press menu on the remote control. Select add.
In the popup screen you have to enter the IP-adress of the computer on which the shared folders are situated. And enter the name of the folder you shared. Don't put anything strange here. Only the name of the folder will do. For example:
NZBDownloads or NZBDownloads/complete. You won't have to enter the / in front of the first folder name. Only if there are subfolders you are sharing.
Repeat this for all the folders you want to share.
thnx to Alan