Well, I just tested. It works.
1. Put my code in a notepad file and save.
2. Name the file "Script_ControlPlayer.cs" and put it in the "[Blockland]\Add-Ons" folder.
3. Enable the Add-On in the Add-Ons menu of the Start Server GUI.
4. Start a server.
5. Get a brick from the brick menu and place (not plant) a ghost brick.
6. Open the chat HUD, type "\controlPlayer YourNameHere" and press "Enter".
7. Control yourself using your normal brick shifting / rotating keys.
8. Profit.
Until you package out the fxDTSBrick::Plant() method and the brick weapon's Fire() method, it'll crash if you do certain things.
You'll also want to disable the player from controlling himself.
@ Trigun:
This is probably the easiest way of doing it. Sure, it's more work on the coder's end, but much, much less work on the user's end. Typically, that's what you want to strive for less work for the user.