there are three ways i can think of off the top of my head.
(1) if you already own Electric Quilt, buy their version of the Farmers' Wife quilt software. you can then easily use EQ to create paper piecing patterns.
(2) Carol Doaks, is one of the most respected and renowned experts in the field of paper piecing. Here is the link to her website, with great paper piece tutorials, and beginning patterns to get you going. if you scroll down the page you'll find free instructions for converting pieced blocks to paper piecing.
http://www.caroldoak.com/free-quilt-patterns.php
(3) are you intrigued by English Paper Piecing? check out this page to see how it's done. (print any block onto freezer paper. cut it into pieces. referring to the instructions you'll find at this site, use them to make your EPP sections, and then stitch them together to assemble the block.)
http://www.cddesigns.com/PaperPiecing/index.html
watch this topic for more ideas. :-)