I trawled the net for a Cathedral Window tutorial and found a few. I have seen the most gorgeous quilts made using this method. I thought I would share some of my finds.:
Cathedral cushion tute
Another Cathedral cushion tute
Great quilt (you tube)
Yet another Cathedral tute (machine sewn)
I made my squares 7" and the windows were 2". I machine sewed my squares using this tute (vid). I hand sewed my windows.
I used quilting needles which was a must as I started without them and I have the wounds to prove it! A thimble too would be good. You need to push hard as you are sewing through 4 layers of fabric.
This process is longwinded but it is worth the effort. I was feeling rough this weekend so this cushion was a distraction. I now have something beautiful that sits on my bed. You can do it, make your hands and your eyes happy, take the time and make something beautiful.