I don't know what you mean by "flexible curl wire" (after all, a conductor is pretty much a conductor, unless you're dealing with high amps, long distances, or modulated signals).
As for pcb path, take a knife-blade and use the tip to scrape away the insulation (green or gold in color), and to scar-ify the surface of the "foil". Scratch it up real good, but careful not to pull it off the pcb backing. Then use the same tip to apply flux to the bare part of the "foil", then, if using a jumper wire, clean and scar-ify the ends and apply generous flux. Heat and apply solder to the wire, then to the foil, and then join them. If the crack in the foil is small, you sometimes don't need a jumper at all, you can bridge it with the solder.
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