Surprised it wasn't with the download...
1. Go to ThinkTanks/game/server
2. Create a new folder named 'dash' in it
3. Drag all files (from the download) to the folder 'dash'
4. Go to: game/server/dash/prefs.cs
5. Change the Adminpassword to your own wish
6. Go to ThinkTanks/main.cs (make sure that that file isn't main.cs.dso)
7. Open it.
8. Add this line to the bottom of it (make sure you have everything)
9. Start up a dedicated server (to see if it all worked)
10. If you do not get any errors on the dedicated-window, then you've installed everything correctly!
11. Experiment with DashCodes. Have fun!
NOTE: I recall reading that if you don't change the admin pass, it won't work.