There is a notion that makes the spacing and the rings on roman shades much much easier. There are spools of twill tape with the rings already perfectly spaced for sale by the yard at most fabric stores, especially the stores that have a home decorating department. My fabric shop sells curtain tie backs, curtain rods and these type of 'roman shade ring tapes' all together for the enterprising sew-it-yourself-er. If you can quilt, I'm sure you can make them.
Best of luck.
-C