It's really easy mate, there's 4 screws underneath holding it on. 2 of them remove a sort of cover thing to reveal the remaining 2... undo them & it just lifts out.
When you put the new one in then there will be a clip that hooks on to keep it secure at the back and then just do the screws up in the reverse order.
Paul will be able to sort you out if you're still unsure.
Like the idea of doing it white to match your roof & mirrors
