http://www.rchelisite.com/how_to_crimp_servo_plugs.php
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWNX:IT
I've done a few of these recently. I'd use the first plug on a dead servo or spare bit of wire to get some practice.
You'll need a low temperature soldering iron with a very fine tip to do it well.
I just use needle nose pliers rather than a crimp tool.