Not really familiar with lead free solder, but according to this site it shouldn't make a huge difference when doing general purpose soldering. As long as it has enough tin (I'd say at least 70%) it should be alright.
I've also never tried the copper wire trick you're describing, but it shouldn't melt or damage your iron if it's just wrapped. Solid core wire (as opposed to stranded) would probably be what you wanna look for, and gauge wise I would think anything finer than the tip of your iron would be okay. Might want to wait and see if anyone else here has tried it before though, just in case there's something I'm missing here.
"I think that the problem with this video is it is highly derivative of many popular bands within the genre. Although when viewed on its own merits, it does have a deeper groove. However what it has in groove, it lacks in originality. One can't help but be reminded of such bands as Pearl Jam, White Zombie, Suicidal Tendencies and other bands that bear the mantle of so called "Alternative Rock". One is even reminded of Lorie Anderson when she wore curlers. Hehehmhm! This video speaks less to the heart and more to the sphincter. In closing, I think Korn would do well to learn more from -"
