Undo the single screw in the middle of the spring on the underside of the scooter using a philipps screw driver and remove the broken spring (you might need to prise this out with the end of the screwdriver).  Place the new spring round the ( ) bracket shapes and make sure the two prongs fit into the holes in the axle bar.  Push the ubend down so it fits snugly round the brackets (don't be afraid to use a hammer) and replace the screw and washer.
 

Undo the eight black screws on the underside of the scooter using a phillips screwdriver and remove the blue or pink deck off the black base..  Undo the 2 silver screws on the brake and take out the bolts and old brake and replace with the new one.  Replace the deck on the black base and replace the 8 screws.

Axle, right or left – Undo the eight black screws on the underside of the scooter using a phillips screwdriver and remove the blue or pink deck off the black base.  Wipe the hole into which the Allen key bolt goes to ensure that it is clean and dry.  Replace the Allen key bolt with the new one, placing the black plastic washer in the middle of it, make sure this corresponds to the left or right hand side as these are both different.  When replacing the bolt make sure that the oblong end of the bolt is positioned nearest the floor.  Tighten the bolt from the top and replace the deck on the black base and replace the 8 screws.

Washer, right or left – Undo the eight black screws on the underside of the scooter using a phillips screwdriver and remove the blue or pink deck off the black base.  Wipe the hole into which the Allen key bolt goes to ensure that it is clean and dry.  Replace the Allen key bolt with the new one, placing the black plastic washer in the middle of it, make sure this corresponds to the left or right hand side as these are both different.  When replacing the bolt make sure that the oblong end of the bolt is positioned nearest the floor.  Tighten the bolt from the top and replace the deck on the black base and replace the 8 screws.

Undo the eight black screws on the underside of the scooter using a phillips screwdriver and remove the blue or pink deck off the black base..  Place the new deck on the black base and replace the 8 screws.

Loosen the two silver screws and remove the silver plate.  Replace the 2 new b bend springs.  Remount in reverse order.

Back or front wheel – Simply unscrew the allen key bolt, remove the old wheel and replace with the new one.  Only the circular side of the bolt will actually turn.