Glad you got it working. Some options are currently set up to work after a mission restart, such as the the ambient system settings. Eventually they will be adjustable on the fly... but in the current implementation, any options should be set before the mission begins so stuff works right.
Also, new update today to fix a major issue with the call-out function.
Small word of advice for the future....please use the Spoiler icon (looks like an eye) on the post bar above in the future to post large chunks of text.
Secondly that isn't an error you really need to be concerned with at it doesn't effect anything. Its just text that spams the RPT for a short amount of time and really causes no issues. I have seen it with other faction mods in the past NOT just VME related items.
3rd person aiming: the bullet goes exactly where the crosshair falls, even over long distance (no significant bullet drop)
Even on full auto, theres not much of an accuracy penalty.
iron sights: the bullet goes anywhere except the spot i'm aiming at.