Is there a Wiki on editing the floorplan to add the devices and everything?
Go to your Web Admin and login then select the menu;
Wizard -> Devices ->Floorplan Wizard
Once in the Floorplan Wizard use 'Add another Floorplan to add the floorplan image you want to use and then 'select which Zone you want to add devices to ie Entertainment Zone, Lighting Zone etc etc. Now you will see a list of the devices available for the Zone you selected to the left of your floorplan image - just drag n drop these onto your floorplan and click 'Save'. Do this for each Zone you have devices in and your done.
...well not quite done! You should do a reload & regen all from one of your Orbiters to make sure the changes to your Floorplans are visible on all MD's.