First trim one sheet of patterned paper down to 11.5" x 11.5", this is the sheet you will be working on. Do not attach it to the cardstock yet. Ink the edges of the paper.
You may also find this template helpful, print out onto a see-through medium, I used tracing paper, Jakey used acetate. This will help you to select the right size of photo by checking through the centre circle. You can also use it to work out the placement of your apertures on the page. Once you are happy with the placement use a paper piercer to make a tiny hole in the patterned paper where each petal meets the circle, you should end up with a circle of tiny eight holes. If printed onto A4 this should give you apertures of about 8.5 cm, so 4x6" photos are ideal.
oops gone to get template, back soon!