The Q-Ship mod for GWX is interesting and worth a look and No continuous 'Ship spotted' for GWX (by h.sie) mod gets rid of the watch crew continually reporting the same contact over and over which can happen on occasion.
Althouth this is not a GWX add on mod take a look at h.sie's patcher for the SH3 exec....
http://www.subsim.com/radioroom/showthread.php?t=174225
Kelly621