Thanks to Marian Meinhard, Notepad++ users can finally use INPs without hurting their eyes:

1. Go to:
http://sourceforge.net/apps/mediawik...Language_Files

2. Download the Abaqus xml file (userDefineLang.xml) and save it in your Notepad++ directory.

3. Start Notepad++ => "View" => "User Defined Dialogue.." Import the downloaded file (userDefineLang.xml). In the "User Language" drop-down menu, you should now see Abaqus, which you are free to edit.