US Grabber File located in – C:\ProgramData\Team MediaPortal\MediaPortal TV Server\WebEPG\grabbers\US\www_imdb_com.xml
This is for Verizon Fios in the Washington, D.C. and Metro area.
I had to also modified C:\ProgramData\Team MediaPortal\MediaPortal TV Server\WebEPG\WebEPG.xml to match channels with my imdb file.
<tr><td><a><#START></a></td><td> <b><a><#TITLE></a></b><i> <a></a></i><#DESCRIPTION></td></tr>