After you have unzipped your print product and installed any new fonts (see Unzipping the Template and
How to Install a New Font ) you may customize the text in either Adobe Photoshop or Adobe Illustrator.

Photoshop
Launch Photoshop and open a .psd file from the product's "psd" folder. Select the text layer you wish to modify. Right-clicking on text on the screen will highlight its layer in the Layers panel:

Choose the Type tool from the toolbar, click and drag across the text on the screen to select it, and type in your new text:

Illustrator
Launch Illustrator and open an .ai file from the product's "ai" folder. Select the text layer you wish to modify.
Right-clicking on text on the screen will highlight its layer in the Layers panel:

Choose the Type tool from the toolbar, click and drag across the text on the screen to select it, and type in your new text: