SonyVegas Howto:2

clipped from thepiratebay.org

To register without them collecting you IP adress (mine is static) go offline and then try to register. You will be asked of an activitation code, simply enter this from a keygen (found one here on piratebay).

When I used the keygen, I also needed to change the serial number since the activation code algorithm uses your machine ID and serial number.