Attempting to land on the Mun or any other body in IVA mode was down right ridiculous when the lander is set to its normal top up orientation. This greatly enhances the game play experience for me.
This part, when installed on the surface of the lander correctly, allows the user to fly the lander with the proper IVA configuration by selecting "control for here" on the LOI part. Just make sure you surface mounted the part so that it says FORWARD above the main viewing window and you should be all set.
NOTE: you will need to use the S and D keys while assembling the lander to get the unit in its proper orientation prior to attaching to the craft.
INSTALL: just unzip and install the HAIT folder in your game data folder