The easiest is if your local rent-a-center has air pallet/jacks (you can usually pull them up on the internet under air jacks). That would be the easiest by far. It is sort of a hovercraft concept for moving heavy objects. You can use these to actually slide the unit all of the way home and never touch the floor.

If not that then a good heavy duty hand truck should do just fine to get it to the hole and then teflon protector slides to slide it into place. Teflon slides are strips of teflon plastic about 2 inches wide and 6 inches long. You can snap pieces together to get the ultimate length you need. Of course, once the back legs are in, all you need to worry about are the front legs and the travel across the part of the floor that will be visible after installation. In the absence of the teflon strips, carpet strips work pretty well.

On initial installation of our unit, the appliance guys had the teflon strips and we used those. After the fact, I needed to make a minor adjustment so I pulled it back out and put it back in using carpet strips and they worked just as well but just weren't quite as convenient to use. Oh yeah, I used a couple of 2X4s to make a lever to lift the front edge just enough to get the carpet strips under the front legs.

Don't worry! It is not as difficult as it initially seems. Good luck!

If you stick teflon "magic slider" disks to the bottoms of the legs, the range can be slid into place, or back out again if necessary, without a huge effort and without scratching the floor. I got my magic sliders at home depot.

Here is a link that might be useful: Magic Sliders

This is the way we do it.

1) Put a blanket on the floor in front of the gap. To protect the floor.
2) On top of the blanket put a sheet of plywood say 4' x 4' to make it easy to push the range in.
3) Put the range on the plywood then push back into place.

Prior to putting the range in place make sure that the range is going to be level you don't want to be pulling it back out.