OK, a cell is one of the boxes in MK's that contains info. When U open a save in MK's, U see several columns. Each column represents a car. There is a cars name at the top. Under each name there is a column of "cells", representing various things. What they represent is listed on the left, like engine, drivetrain, chassis ect....Pick the car that U want to replace, and then click on any cell under the name of it, and import the car.