These are some games I didn't find in the database when trying to put my collection in:

Advent Rising
Area 51
Castlevania:Curse of Darkness
Darkwatch
Doom 3
Fantastic 4
Ghost Recon: Summit Strike
Kingdom Under Fire:Heroes
Metal Slug 4 & 5
Midway Arcade Treasures 3
Mortal Kombat: Shaolin Monks
Ninja Gaiden Black
The Warriors
X-men Legends 2

Also, I believe I found an error. There is an item under Xbox called "Xbox Music Maker". I believe that was supposed to be "Xbox Music Mixer". Here's a link to an example of it -
http://games.teamxbox.com/xbox/680/Xbox-Music-Mixer/