Yep, just buy some large posters of 1950's "B" Movies like "Plan 9 From Outer Space" or "Night of the Killer Tomatos" and stick them up with that blue gummy stuff that pulls off cleanly. (you can get it in any office supply store).
Take this one for example:
The movie poster shows that it stars Bela Lugosi. In fact, Bela Lugosi had died several months before the movie's release. The movie producer, Ed Wood, simply included some footage of Bela Lugosi that he had shot while Lugosi was still alive and included it in the film so that he could claim Bela Lugosi was in it.
You don't need to know the rest:
The police inspector in this film was played by an unsuccessful part time professional wrestler, unsuccessful part time professional actor of Swedish descent named Tor Johansson. Tor Johansson is probably the stiffest actor ever filmed; he reads his lines one word at a time and simply cannot muster any credibility in his role whatsoever. But, when Inspector Clay (Tor) is killed by space aliens and comes back as a zombie, you'll see the best zombie impression you ever saw. Tor's "stiff as a board" acting disability made him absolutely brilliant as a zombie. Ed Wood realized Tor stunk as an actor, so had him killed off early in the film so Tor could shine as a zombie.
Tor Johansson struts his stuff as a zombie.