Sorry, I forget which is an included command and which is custom.

So you will have 2 files named UnwrapCurve. A js file and an htm file. These both are placed in the "commands" folder of the MoI installation. (Be sure MoI is not running)

For windows, you can right clcik your moi icon and choose properties-open file location. Or "X:\Program Files (x86)\MoI 3.0 beta Aug-1-2013\commands".

I dont know how for Apple.

Then either make a shortcut with the command part as UnwrapCurve or just hit tab and type UnwrapCurve and hit enter.