Just tried PVP and my agent just refreshes. Even changed the gear so its in the exact same slots and still agent does nothing.
Step one is to make sure the only cheats you enable are No Toast, and the PVP TESTER; enablling anything else will mess it up. That's my fist recommendation.
It is suppose to determine how often the item is hit on roulette like a percentage, but changing it does nothing to increase chance of getting item.
Increasing the chance to get the item is exactly what increasing the weight does. We know this becasue that's how the Unstable-ISO drop hack works during Spec Ops times. The thing is, some tables can have their weight changed without a CVE, and others cannot.
The thing to remember is that in an entire loottable, all the numbers must add up to 100.00, or so we understand thus far.