Step 1: What you need
1. a computer that has been previously connected to the wireless network that you want
(this is because the key that you want is stored in a windows file on that computer)
2. access to that computers administrator account (try this instructable )
3.the program wirelesskeyview
!!! warning just do a quick virus scan of the file to make sure its clean, cnet usually is good about not having viruses !!!