Downloads the current sysinternals tools from \\live.sysinternals.com\tools and then updates your path environment variable to include the location saved to. Along with that it sorts, and removes duplicate entries in the path variable.
This script is tested on these platforms by the author. It is likely to work on other platforms as well. If you try it and find that it works on another platform, please add a note to the script discussion to let others know.