Oh YES you can! This list of Homemade Curtain Rods proves that you do not have to go into debt to decorate your home with lovely window treatments. These DIY Curtain Rods are all about thinking outside the box.
12 Homemade curtain rods
Curtain_Rods_and_Finials - How to create your own curtain rods for $5.
Make your own curtain rods - good tutorial to use if u have an extra wide window to cover!
How to make a custom curtain rod for less than $10 using conduit and drawer knobs.