How to install Call of Duty and Counter Strike : Condition Zero without CD or CD/DVD Drive

Gagawa tayo ng virtual drive na parang may CD/DVD Drive ka.  Kunyari lang na cd.
1. You need to create a virtual drive that ISO file extension that he read.
Download  Daemon Tools

 
2. After you install it, right click the drive Mount, Unmount and select the iso file game.
example:
 call of duty.iso  or  counter strike.iso