Hi, I'm using Sony Vegas Pro 15 and I'd like to install it on a second computer (belonging to my son in my own household). I have a registered product with a serial# but it seems that the second installation is no straight forward affair as it requires opening another account etc. and even so both computers must be in operation when only one of them needs to be in use. When I first purchased the software I was under the impression that using it on two computers was part of the deal but independently as though they each had a separate program on. Could you please shed some light on this? I appreciate any instructions to do this properly.