Hmm, couldn't help but notice while watching the Yokohama highlights in Bonjovi.com:
When they play In These Arms, you can hear a 3 keyboard noices at the same time

The silent hum in the background, playing chords or the... um, key chord? (dunno what's it in english; sävelläji), then the clear piano playing the chords and then another synth with a fanfare sort of effect playing "lead".
Do you think they had an additional kayboard player or did they add the hum there afterwards?