If you read that link, you will see that you did not follow the instructions. You are supposed to set it up for zone 3, not zone 2. Then there are a bunch of remote presses you didn't do either.
As for the efficacy of doing this... I tend to agree with the nay-sayers. I don't see the point of bi-amping if the two power amplifiers are amplifying full-range signals, which is a separate issue from removing the crossover from the speaker. As I understand it, the point of bi-amping is to prevent large bass-power transients from overloading the midrange and treble amplifier, by separating the bass and treble signals with active filters. If both amplifiers are amplifying a full range signal, the bass frequencies can still overload the treble amplifier. An audio power amplifier is a voltage-controlled device, and you can drive it into clipping even with no speaker attached. Connecting two full-range amps will provide improvements more on the order of bi-wiring than bi-amping.
The crossover is another issue. It does provide phase-coherence at the crossover point, so replacing it is a tricky business. You would have to know its response, and synthesize the same filter in the electronic crossover. This is probably beyond the ken of the average user. However, leaving the crossover in the speaker, and using gentle low pass and high pass filtering on the bi-amps will give the desired result. Low frequencies are attenuated by the high pass filter so they don't overload the treble amp, and the crossover still controls the speaker cones at the crossover frequency. The user still needs to set the high pass filter so it is low enough to overlap the crossover frequency, but this is a relatively easy adjustment.