Kawi - With the converted camera the metering still works pretty much normally, but as you experiment you find a basic +EV sweet spot. You have to adjust your brain a bit to "see" the infrared radiation, and recognize the bright areas. But with digital that's a snap.
After experimenting I normally shoot my stuff at +0.8 - +1.3 EV with this camera. The good part is, the best time to shoot IR is normally the worst time to shoot normal stuff. When the sun is high and bright, and everything normally looks flat, IR is killer. With all that light shooting stopped down (the above were at F8) at +1.3 EV is no problem. That's why I converted this little D40X. I bought it originally because it was tiny and would be a good choice to take with me when I'm riding my bicycle, but the light always sucked for normal stuff when I was out riding and I rarely shot anything. The IR conversion fixed all that. ;)