Hey, I made this thing, thinking it would be cute! and it is. If I do say so myself.

As I was making it, I took some pictures to put together a tutorial, but there is something of a stumbling block... Which is step one:
1. Design and create a ghost screen from which you can print your many ghosts...
(I use the method described in this tutorial:
http://craftgrrl.livejournal.com/3674467.html?page=1 )
Although, I bet, if you used a piece of paper and a fabric marker, you could come up with something fairly good?
based on the size of your ghost (Mine are about 4 inches wide), cut out 20-25 pieces of fabric to print - I like an inch border on all sides of the design, that way, one doesn't have to be too precise with the printing. (It helps to cut them out first, because then you can move the wet ones out of the way as you finish them and lessen the risk of sticking the elbow your sweater into fabric paint, or getting paint on the screen that will transfer to every subsequent ghost.)
3. print with fabric paint. Allow to dry.

4. iron all the squares to fix fabric paint, according to the paints' directions.
5. cut a square of double sided applique adhesive for each ghost - smaller than the fabric the ghost is printed on, larger than the design. Affix each ghost to some adhesive, by ironing.
6. Cut out the ghosts, leaving a small margin outside the line. (You don't have to do this, but I like the effect myself).
7. Removing the paper backing of the adhessive, stick them to some black felt. (I used a quarter of a yard of the 72" wide stuff)

8. Cut out ghosts, leaving a margin of felt around all edges (again, optional).
9. Now the wreath - I used a wire frame from the craft store, and wrapped it with strips of the leftover black felt.

and so on until the whole thing was covered.
10. using your hot glue gun, attach ghosts to wreath.
11. add bow.
Happy Halloween!