copy the blockland shortcut, name it what ever you like to tell the deferenct between dedicated server and normal start up,
left click (or right click depending on your mouse settings) and click Propertys,
then click the tab "shortcut"
then where it says target : "C:\Program Files\Blockland\BlocklandLauncher.exe"
replace that with : "C:\Program Files\Blockland\BlocklandLauncher.exe" -dedicated -map skylands
Ta-da dedicated server.