I thought some of you might be interested in this information. :-)
For those of you who are given an older (or newer) sewing machine or buy one at a yard sale or thrift store, here's where you can purchase manuals for your used machine. PLUS they have threading diagrams for almost every sewing machine ever made!
Manuals:
http://www.sewusa.com/Sewing_Machine...on_Manuals.htm
Threading Diagrams:
http://www.sewusa.com/Sewing_Machine...g_Diagrams.htm