Here is a good instructional guide. It sounds like it exactly like pp using a fabric underlayment to provide stability for the different fabric types. You just use a running stitch or standard machine stitch. When you turn the pieces over, you won't see the stitches. The back doesn't matter because there is always a simple backing attached (usually velvet and NO batting).
http://www.ehow.com/how_13974_interl...azy-quilt.html