I need some help with custom commands 
	Page 16 of the Interface Guide starts a long list of manipulator datarefs. 
	I have built some hardware and would like to add a rotary encoder for changing the EHSI range.
 
	On page 22 of the Interface Guide I found - ixeg/733/ehsi/ehsi_range_pt_act and ixeg/733/ehsi/ehsi_range_cpt_act 
 
	On another forum post I found -  
	     [EHSI Range] 
	     new_command=EHSI Range 
	     dataref=ixeg/733/ehsi/ehsi_range_pt_act 
	     description=EHSI Range 
	     values = 0, 1, 2, 3, 4, 5
 
	The problem is I have no idea where to put it to make it work. I have tried to find a beginners guide to Commands and Datarefs with no luck. 
	It seems that I should be able to cut and paste but I don't know what files or which program to use.
 
	Any help with this would be greatly appreciated.
 
	Thanks