It doesn't require brickpacks, everything was default. Also, try downloading by right clicking the link and choosing "save link as".
It mostly worked, almost all of the bricks spawned, but thats good enough. The build is awesome, one of the best Christmas builds I've seen. One last thing, you said this is an early version, right? Because in the few pictures I have seen, there were a couple houses that werent in this one.