It is easy but a few things you want....
1. The 110v spot welder
2. Nice Tongs that have a nice flat edge
3. A little steel to practice with
With mine, I just clamp everything where I want them, tighten up the spot welder, and double check things.... then hit the trigger for about 3-4 sconds using th color and size of the red spot to tell when to stop (where the practice helps)
This page should show you what I mean...
http://www.quarterbore.net/forums/showthread.php?t=544
I really need to get some text to go with those photos!