I want to install a new toilet. Would like the new toilet to go exactly over the 2 existing studs (whatever they call the two screws coming out of the floor;-). What steps do i need to take? I imagine that the waterline will not fit exactly to the new toilet, what do i need to do and how complex is it for someone who still uses a butter knife for a screwdriver (slight exageration, but only slight). Thanks for your help:) JD (P.S. I will be buying the new toilet from Home Depot)