You can find the manual here:http://us.lgservice.com/index_b2c.jsp
Click Owner's Manuals
Under model enter BH100
The manual does not say much about playing HD DVD or Blu-ray:
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
The menu will appear.
The above HD DVD menu is displayed only
when an HD DVD disc with iHD features is
2. Use the < / > buttons to select an option, then
The sub options will appear.
Play / Pause - Starts playback / pauses
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
3. Use the < / > buttons to select a sub option,
then press ENTER to acknowledge the selection.