Cruzomatic,

Yes, that is all there is to it. Make it a 20 ohm 2 watt resistor. I had a mistake in my original post, which I have since corrected. This will give you about 250 ma on a 4.8 V pack, which is about what you want.

If your DMM has banana plug leads (most do) and you have a Rx charge cord with banana leads then it is handy to solder a set of stackable banana plugs (available from Radio Shack) on the resistor. They allow you to stack the charge jack on top. Just solder a plug on each lead of the resistor. Plug your charge jack on top of each of the resistor's plugs and plug the assembly into your DMM. If you ever need to check the battery pack voltage without the load then just unplug the resistor, etc.