Thanks for that. I have been contemplating something like that but you have done it for me 
It can use some additional features 
The main one for me is to have e.g. separation of board packages. E.g. one for pure AVR, one for ESP8266 etc. So I would have a few copies of the install on the USB (different directories and a few bat files, e.g. IDE_AVR and IDE_ESP8266.
Note:
I would not have thought of creating links, just copying.