Measure the fabric you have selected to your desired screen size. Then measure about an extra 6 inches at the top and bottom. Carefully cut out the fabric.
Cut two pieces of PVC pipe to about 1 inch longer than the length of the screen. Place one pipe at the top of the fabric. Pull the top end of the fabric over the pipe so that it is completely covered, leaving a little extra room for stitching. Using either a sewing machine or by hand-stitching, make a seam that sews the pipe inside the fabric. So in essence, you should now have a tube in your fabric that the pipe can be slid into. Repeat this on the bottom of the fabric.
Take the ends of the fabric on each side of the pipe, and use hot glue to glue the fabric and the pipe together. Do this to the top and the bottom. This will prevent the fabric from sliding off of the PVC pipe.
Drill a small hole on each side of the top PVC pipe that is big enough for the string to fit through. Put the string through each hole, and tie a knot at the ends so that it will stay. This will allow you to hang the screen.
Place two ceiling hooks in the ceiling, spaced apart the width of the screen. You can use the string to hang the screen from the hooks. The screen can be taken down and rolled up for easy storage.