Castaline
I'm presuming this is a weight forward fly line, it should say wf somewhere on the box, list of contents if there is no box.
If it is weight forward then the first thing you need to do is find the reel end. This will be the end of the flyline starting with a long section (10 meters + probably) of level, thin line. The opposite end of the fly line will have a short thin section tapering into a thicker section, this will be the end you attach the braided loop to.
Before you start on the loop end you need to attach the backing to the reel with an arbour knot, see webpage below
http://www.animatedknots.com/arbor/i...matedknots.com.
Reel around 70-100 metres of backing onto the reel and cut the backing.
Then tie the reel end of the fly line to the backing using an albright knot, below
http://www.animatedknots.com/albrigh...matedknots.com.
Wind the flyline onto the reel as evenly spread as possible.
Once all the fly line is on the reel, dip the very tip of the line in superglue (stops water wicking up the line) and leave to dry. Then using an "inchworm" technique attach the loop, This thread explains the technique.
http://flyforums.co.uk/showthread.ph...hlight=braided Then you're ready to go.
Steve
W