Are they wooden or metal poles? How heavy are they?Look at your window frame. The brackets that the curtain pole goes into. Will it fit onto the window frame on each side? Is there a centre bracket? Can you attach it to your window frame at the centre of your window frame?I ask these questions because many of the more modern window frames are too narrow for wooden pole brackets.If the brackets are too big, then the best way to fit, is to first find out if there is solid wood at each end of your window frame at the top?If there is you can screw the brackets in at each end.And attach the centre bracket as usually that is smaller.Now if there isn't anything to hold the bracket to.You will have to attach them with a suitable wall fastener for your type of wall.Failing that you will need to find where the first wood dwang behind the wall is(with a stud finder) and attach bracket to that.Hopefully it won't be too wide.Put up brackets, hang pole, attach finials, out up curtains.Good Luck!
Gerald Brown., January 2008