To install this, simply drag and drop microlight to your resources folder.  

Feel free to rename it

Go into your server.cfg (or resources.cfg if it's there) and start or ensure the name of the folder (CaSe SeNsitIVe!)

by default you should have either:
start microlight
or 
ensure microlight

Once done start your server and voila! Enjoy a realistic handling'ed plane! :)