Missle questions....

i use missle very much and like them. I can use four British Light Chariot to sally froth a full sized (twenty units) and defeat them in one battle. My questions are concerning about the accuracy of missle units. I want to know that is there a 'accuracy figure' for each type of missle unit to determine their accuracy? Does experience increase their accuracy?
Also i want a peice of advice on the placement of missle unit when defensing. I am fustrated to see my unit being hurt by my own missle. Thanks

I am pretty sure that the more experienced your units are, the more accurate they are. Also, if you are playing the original, no-patch, version of the game, I would suggest downloading the patch. I think the patch was supposed to fix all of the friendly fire issues, that is, of course, you are shooting into a large melee, then you would hit your troops, patch or not.