how can i convert wpa psk password to wep key
Hello and welcome to Tom's Hardware Forums.
I'd have to start by saying it isn't a good idea to depend on the WEP security level - any local kid with a basic knowledge of Linux could hack through that and you could have fun proving you didn't download a lot of illegal music. That said, here's a link to the Sticky Post on this subject. http://www.tomshardware.co.uk/forum/38111-18-find-change-wireless-security
Please post back if you need more advice.