Here is what I did.
First, I found a foglight wiring kit that comes with all relays and whatnot. The particular one I purchased was from Discount and made by APC (barf but it works). The kit comes with a bunch of wire, fuse block and most importantly a relay that can handle some decent amperage.
After tossing away most of the seperated to foglight wires, I simply wired up the fuel pump like it was a single foglight. Since my battery was in the back of the car, it was easy to bolt the 12 volt constant wire right to the positive terminal. If your battery is not in the back, you're in for running some wire. No biggie. The reason I went right to the battery for 12 volt consant is that the fuel pump will now be pulling the most un-interrupted power that it can get.
For the 12 volt switched part of the relay, I ran wires up towards the fusebox of the car. Then it was only a matter of a little test light action while fiddling with the key to find a switched 12 volt accessory to jump off of. I found an empty/unused fuse block and stuck a male spade connector on the 12 volt switched wire and plugged it right into the fuse box slot. Now, I went on the ultra cautious side and added a fuse to the switched 12 volt wire just in case...you never know.
Now comes the fun part of wiring up the fuel pump itself. It will have two leads, a power and a ground. If you've recently installed a fuel pump in your 240, you will already know this. Follow the leads from the pump up through the grommet and to the connector (the one that resides under that plate with the arrow on it. Unplug the connector and cut the 2 pump wires. The ground wire you will want to ground to the chassis and the positive wire will go back to the relay.
After all is connected and good solid grounds are established, turn the key to the switched on posision and you should hear the fuel pump whirring.
I HIGHLY reccomend having the battery disconnected if you have the fuel pump at all unbolted from the tank. Please don't blow yourself up with gas vapors.
Hope that helped, steve.