This may be a stupid question, but I just looked at my hitch for the first time today. On my '03 LX, I have the integrated hitch (behind the bumper fascia). Must I use the factory bolt-on hitch setup or is there some way I can use my standard 2" receiver in the hole in the middle of this hitch? I have an adjustable-height receiver that has plugged into every truck I've had for the last 10 years. It's gonna SUCK if I can't use it with this truck.........If you have any thoughts on this, please advise. Thanks.