First off, welcome.
Most manufacturers use the same IR codeset with different functions mapped to different buttons depending on the model of the equipment.
The easiest place to find codes will be in Device CCF files from the Classic Pronto. Upon download and unzip, you must use File->Import CCF from the Editor.
[Link: files.remotecentral.com]You may then find other codes in the Next Gen File Section Here.
[Link: files.remotecentral.com]You can open these files natively with ProntoProEditNG or ProntoEditNG editor.
As the remote you have is a Next Generation remote and the forum for that remote is here:
[Link: remotecentral.com]If you cannot find codes that work from either of these 2 links, post back to the NG forum and I'm sure someone can assist.
Lyndel