Multiple Broker on a single Mt4 installation?

 
How do I set up my MT4 platform such that I can access multiple Brokers on a single installation?

Is it even possible to run multiple copies of the same MT4 program (accessing different brokers) all at the same time?

OR is it simplier/easier to just install all the different broker's platform and run them independently?
 
You cannot run 2 or more client terminal instances from one directory simultaneously.

Instal different terminals into different directories. And run they at the same time.