Should be just a case of
1. Remove under tray.
2. Loosen all engine mounts near it to allow the engine some moving room.
3. Jack up the engine to clear the mounting.
4. Remove and refit new mounting.
5. Tighten and torque up all mounts.
The preferable way however would be to use ramps to lift the car and hold the mounting bracket with a hoist and raise the engine by lowering the car.
Isn't that the mount that needs undoing to change the cam-belt?! 2 birds with one stone maybe!?