For the sky you can use the Moon prop, as well.
For the furniture, it depends on how you want the finished product to look. Do you want the decorative legs? Then cut the cabinet part out of the picture and put it on a generic box. Choose the table prop you want to use for the legs, and apply a texture to match the cabinet. Then, you can just sit the generic box on top of the table to get your finished product. You'll probably have to do some adjusting so it doesn't just look like a box sitting on a table..
If you don't want the decorative legs, you can use just a generic box or even a large or small black dresser..it has short legs on it.
Damn you, Addamant, for turning me into a forum whore! *shakes fist*
_Monk_: What does BB stand for?
_Monk_: Ball busting? hehehehe