Replacing dvd drive in a Acer 1670

Can someone direct me to instructions on replacing the liteon sosw852 dvd drive on a Acer 1670 laptop.
What is the best dvd drive to replace it with.

Just to update the forum

To change the drive, undo a screw under the drive and slide the unit out.
I replaced it with a matshita UJ 840d dvd/cd drive.

Bad choice if you want to have it region free and burn more than 2 brands of media…