As I am not sure if any of the patches change things in the weapons.txt, here's an up-to-date version of the Less Accurate Mortars mod:
http://www.mediafire.com/download/9j...a4/Weapons.txt
81mm & 3inch mortars' accuracy reduced by 50% from 461 to 250. Smoke rounds and 2inch mortars are unchanged.
Put the file to "Close Combat - Gateway to Caen\DATA\BASE", make a backup of the original file.