wep key recovery

ive been looking for hours to find where it is saved. its not where i thought it should be. im trying to export it to another macbook pro. and its not in keychain.

..does anyone understand the problem. or do i need to reword it.

the problem is we dont know the key so we cannot log onto the router

here is the story. one of our users lost their home WEP password and we need to find the file containing that password and the SSID to import in to their new laptop. the file is not in keychain. the problem is this, the user in not computer savvy in any way and cannot navigate after their router in reset so we need to find this file ( i am not staying at the office until the user gets home and walk him through it at 8pm) would either of you know where that file could have gone off to?