HidePlayerFrame does just what it says.  It will hide the player frame when it's not really needed.

First, if you are targeting a hostile that is not dead, you will see the player frame.
Once the hostile is dead, you will continue to see the player frame until health (or health and mana) are full.  Then the player frame will disappear.
Anytime you are in combat, the frame will be visible.

Currently in beta, I'm looking for help from folks that use XPerl and PitBull as really this mod is best paired with a custom UI.

Please post issues and problems so that I am able to address them prior to a non-beta release.

Enjoy.