for HD DVD playback, you don't get a HD DVD graphical menu system, you get a set of menu bars with the following options. Most "special features" or "extras" or "bonus features" on the HD DVD disc are not accessable
From the LG player manual
Using the HD DVD with iHD features
You can change title number, scene number, etc using the HD DVD menu.
1. Press DISC MENU or TITLE during HD DVD playback.
The menu will appear.
The above HD DVD menu is displayed only when an HD DVD disc with iHD features is playing.
2. Use the b / B buttons to select an option, then press ENTER.
The sub options will appear.
Play / Pause - Starts playback / pauses playback.
Title - Selects a title on a disc.
You cannot select a title whose number is shown a gray color because the title is
recorded with black by contents providers. It is normal.
Scene - Selects a scene in a title.
Subtitle - Selects a subtitle language.
Audio - Selects an audio language, for playback only.
Basically for HD DVD, all you can do is set the audio options and play the feature, and use a text menu to skip to a numbered chapter
to find the LG owners manual in PDF go to this find owners manual link and enter DVD & set top (twice, under product group and product) and sesarch for BH100http://us.lgservice.com/index_b2c.jsp