How to use sniperspy to hack passwords

Previously I wrote an article on Remote spying software sniperspy, I  really received a positive response from readers but some of them failed to understand and i was asked following questions constantly:1.How can i use Sniperspy for email hacking?2.Is my order 100% safe?3.If i dont Have phisical acess to victims computer can i still install sniperspy?4.Will the victim know about it if i install