Question: Suppose we have a networking in a LAB and i have total rights over all other systems on the LAN. Now how to change the wallpaper of the system which is there on the LAN???

Answer: This question has been heroically rescued from the Open Questions forum by Greg Woosley. You can view his reply below, and stop by his website at http://codenoter.blogspot.com/ for some useful tips on "tricky geek things he's figured out once and doesn't want to figure out again later".