Here is the last segment on engine lighting.  DO NOT BUY THIS:

Lighting tutorial: Engine lighting part 3

Here is the next segment:  Soldering!

Make sure your solder is labeled for electronics!  Solder for plumbing contains too much acid and can damage electronics. 

Soldering 101

And a link to a few useful sites:

A good site with clear directions on soldering:

http://www.kpsec.freeuk.com/solder.htm

This site, while not clear does explain why you do each step:

http://www.epemag.wimborne.co.uk/solderfaq.htm