Do you have one cluster then? (With the cluster containing 2 QVS and 2 QDS?)
In other words, is there one location where you can find all QlikView server logs and one other folder to find all Distribution Service logs?
If this is the case, then you configure it as you would a simple one server configuration. The doc should get you started there. See Online Help.
Let us know your configuration is not as described above.