Hi there,
There aren't any specific instructions for this set. They are designed to use 'as is' or you can layer them. I would recommend using the .png files that are included if you want to layer the brushes. As you can see in the image below, there is a 'detailed frame', a 'mask' for your photo, a 'solid' frame, and some of the designs have a 'inset' that is just part o the detailed frame and can either be used alone as a frame around a photo, or as a way to add a secondary color to the detailed frame. If you are using the .pngs you can use a color overlay or a color fill layer to add color to the different layers. If you are using the brush versions you can just chose a color before stamping the brush on your document, create a new layer and then stamp with a different brush and a different color. HTH!
We have some great tutorials on the blog about using color:
TUTORIALS on recoloring:
https://scrapgirls.com/all-posts/recoloring-colored-scrapsimple-templates-huesaturation
https://scrapgirls.com/all-posts/recoloring-digital-scrapbooking-elements
https://scrapgirls.com/all-posts/color-replacement-tool