Pentaho BI - add MongoDB database connection

I have installed Pentaho BI 5.01 on Windows 8 server
Now we need to import data from MongoDB.

I have tried copying different MongoDB drivers (standard Java drivers and experimental JDBC4) to administration-console/jdbc and bi-server/tomcat/lib, then restarted Pentaho BI. As a result no new driver appears in Datasources Management.

My questions are:
1. Which is proper way to add MongoDB driver to Pentaho BI?
2. If JDBC driver fails is there any other way to fetch data from MongoDB?

Thanks in advance!