Synthetic winch line is some pretty neat stuff. It's safer than steel, stronger than steel and lighter than steel. It's only draw backs are it's weakness to abrasion, heat and UV light. Below are some links to care and use of your synthetic line.
If your winch line does break then simply splice it back together:
http://www.pirate4x4.com/forum/showthread.php?t=177344
More tech courtesy of Scott at rockstomper:
http://www.pirate4x4.com/forum/showt...hreadid=177074
Synthetic line is a little slippery so here's a way to attach it to the drum:
http://www.pirate4x4.com/forum/showthread.php?t=484039
Straight from the manufacturer, how to splice and make eyes.
http://www.samsonrope.com/index.cfm?page=28