How to color a line based on a word in that line.

I'm feeding log files to AvalonEdit and I'm looking for a way to highlight (or colorize) an entire line if a certain word is on that line.

For example;

WARN:2014/09/19 19:59:31.094:TEST_MGR:tm_tm_check_software_versions: MD5 mismatch between CPUs or CDUs

ERR:2014/09/19 19:59:34.093:FAULT_MGR:Object: FAULT_MGR on CDU1    <--- I want this whole line to be White on Red because of the "ERR" 

WARN:2014/09/19 19:59:34.093:FAULT_MGR:fms_add_state_transition: 

Is there a way to do this?

Also (as long as I'm here) is there any documentation on the current version of xshd? I found the old stuff but I can't find anything on the new format.

Thanks,

Tom P.