You don't need ISDone library, there is ISArcEx here:
https://fileforums.com/showthread.php?t=104980
If you want to use ISDone library, there is a example script somewhere on the internet, most likely where ISDone library is shared by it's creator (krinkels.org)
Moreover, to a new person I would not suggest scripts like ASIS, CIU and such to learn about this, they are just too much.