you need to do something to the blockland shortcut first,
right click the shortcut and goto properties
click on shortcut at the top of the little box that opens up
it will say a bunch of things taht i dont care about
the thing you want to focus on is: "Target:" next to that is a box that should have the following in it: ""C:\Documents and Settings\Owner\My Documents\blockland\Blockland.exe"
change it to this
"C:\Documents and Settings\Owner\My Documents\blockland\Blockland.exe" -mod editor
that should make it work, hope this helps