Thanks Macguba,
There was an Init.sqs in the mission folder already, so not really knowing much about scripting, I put another Init.sqs in the mission folder but called it Init1.sqs. Then I put a civilian in the mission and in his Init field I typed, [] exec "Init1".sqs bugger, no good so I tried, exec "Init1.sqs", no luck there either. I think I did the script right, I copied the line from the forum, markername setMarkerType "empty" then put it in notepad file with the file extension all files saved as Init1.sqs in the mission folder. I'll give it another go, then try something with the existing Init file like put it in there. Thanks again.