Your image in Photoshop should have these numbers in the "image Size" dialog box for images with lots of fine detail.

Screenshot 2014-04-28 09.38.46.jpg

For image with less detail, you can get by with:

Screenshot 2014-04-28 09.39.15.jpg

After your image is ready, follow the instructions in this:

The paper you will be using is Espon Ultra Premium Presentation- Will be known as "Enhanced Matte Paper" in the print setup dialog.