Here is a patch structure report made with GT-10FxFloorBoard editor...
I have used the assign 1 to control the Whammy dive as a timed event with the 'Internal pedal', controlled by CTL2 pedal. Adjust the Internal Pedal Time, anf the Wave Rate to get the correct 'dive' curve..
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Boss GT-10 Patch Summary Thu 10. Jun 14:14:20 2010
Patch name: Sterling's Patch
Patch Mode Output Select = JC-120
Signal Chain = [CS] [PDL] [LP] [OD] [A/B Split] [FX1] [PreAmp A] [NS_1] [PreAmp B] [NS_2] [FX2] [A/B Merge] [EQ] [FV] [DD] [CE] [RV] [DGT]
**********Pedal FX***********
[Pedal FX :On/Off] = On
[Exp 1: Function] = PB/FV
[Exp1 Switch: Function] = Pedal FX
[CTL 1: Function] = FX-2
[CTL 2: Function] = LED momentary
[PB: Pitch Min] = 0
[PB: Pitch Max] = -24
[PB: Pedal Position] = 0
[PB: Effect Level] = 100
[PB: Direct Level] = 0
[FV: Level] = 100
[FV: Vol Min] = 0
[FV: Vol Max] = 100
[FV: Vol Curve] = Fast
**********FX-1***********
[FX1: On/Off] = On
[FX1: Select] = SLICER
[SL
attern] = P1
[SL :Rate] = 50
[SL :Triggr Sens] = 50
**********FX-2***********
[FX2: On/Off] = On
[FX2: Select] = OCTAVE
[OC :Range] = 1
[OC :Octave Level] = 50
[OC :Direct Level] = 50
**********Assign 1***********
[Assign1: On/Off] = On
[Target] = PDL: PB Pdl Position
[Min] = 0
[Max] = 100
[Source] = INT PEDAL
[Source Mode ] = Moment
[Range Low] = 0
[Range High] = 127
[Internal Pedal Trigger] = CTRL 2 PDL
[Int Pdl Time] = 17
[Int Pdl Curve] = Linear
[Wave Rate] = 20
[Wave Form] = Triangle
