Step 1: Tools
Xacto Knife Handle
Xacto Keyhole Saw Blades
Xacto Router Assortment (scraping/digging)
Large Nail (yes really)
I think it's about $5 for the Pumpkin and about $40 for the knife set. I bought the knives about 3 years ago and I'm still on the same blades.
If you are reading this, but are just going to end up carving a 2 dimension pumpkin (light and dark), the Keyhole Saw Blades are awesome and beat the grocery store kit saws hands down.
Step 2: Zombies Shmombies/Mummies Smummies
The first thing I did was a very technical process where I opened the picture in paint and replaced most of the black with grey. My wife would be upset if I used all the black ink just to print a zombie's background in black. How would she print coupons?
For those of you who don't know, it's just open the picture in Paint, then click grey, then click the paint bucket, then click anything you want to be grey, then save the file.
I also drew a line through the center of his face where the transition from the lighted side to the darker side would be. More on that later.