Hi there,

This link might help in playing the game since they don't put in a manual.

http://db.gamefaqs.com/computer/doswin/file/mall_tycoon_2.txt

You would have to build your employees to a certain knowledge level and hire the right people to get to be Security Guards. Basically, they would have to do "research" which you would choose for them. The link will explain it in length.

Good luck. I had a tough time playing this until I saw this link..so hoping that it will help you too.