Howdy - just got an eccentric ENO wheel to convert my old MTB, and had some newbie questions about proper installation of the freewheel.

1. Should the (Shimano BMX) freewheel thread on clockwise or counterclockwise? And do I need to use the freewheel removal tool to install the freewheel, or should it screw on easily by hand?
2. Do I need to grease the hub threads before installing the freewheel?
3. Is there anything else I should know before proceeding?

Many thanks!
Steven