PLIIz height speaker placement

Hi all,
New to the forum and just bought a HT-S6200 and really want to put this front height speaker to the test. Problem is... there is no guide on how high it should be or angle to the "sweet spot" on the sofa. Could someone please advise on where would be the optimum position for these speakers?

The guide from Dolby is directly above the front R/L speakers.


http://i160.photobucket.com/albums/t171/JohnS45/Dolby-Pro-Logic-IIz-9_1.jpg

The guide from Dolby is directly above the front R/L speakers.


http://i160.photobucket.com/albums/t171/JohnS45/Dolby-Pro-Logic-IIz-9_1.jpg

Yep, that's exactly where they should be placed.