Step 1. Go to:
http://forum.blockland.us/index.php?topic=82639.0Step 2. Press Gamemode_Zombie.zip
Step 3. Save zip file to your Add-on folder that is located in the Blockland folder.
Step 4. Open Blockland.
Step 5. Start a game.
Step 6. Press Add-Ons.
Step 7. Make sure you enable Gamemode_zombie by pressing the box in front of it (you will see some sort of v inside of the box).
Step 8. Press Done.
Step 9. Pick a map.
Step 10. Launch game.
Step 11. Choose the zombie spawn as one of your bricks ("Special" category).
Step 12. Create zombie spawn.
Step 13. Wrench zombie spawn.
Step 14. Choose Zombie Normal (for example, you can also choose other zombies).
Step 15. Press: Send>>
Step 16. Congratz, you just spawned a zombie, now start a minigame and get playing...
When you want another add-on, repeat step 3 to 10.
KTHNXBAI.