With this particular method, the five-way switch always works no matter what. Just that when this switch is 'on' (up), the bridge pup is added into the circuit. So if your 5way is already in 'bridge' or 'bridge/middle' position, this switch does nothing at all, but if your 5way is in 'neck' then turning this on adds the bridge, or if its in 'neck/middle', then turning this on gives you all three together. Hope that makes sense.
If you want a switch where turning it on always turns on all three pickups, just add the wires from the additional pickups onto that top right lug. There's probably a more elegant way but that would work. If you wanted to bypass the whole 5-way, tone and volume controls for a "FULL F*'N ROCK" setting, basically a 'Spinal Tap' button, you could do it but it would be tad more involved and probably not that much cooler. You should learn about electronics and how they work, then you'll be able to get creative and make your own diagram. It's really simple, junior high shop class stuff, you can teach yourself with some helpful web sites. Here's a site to get started.
http://www.1728.com/guitar.htm