Hello Rod,
[I've split this post from it's original forum topic, given that it's on a separate subject.]
If your MIDI second-touch keyboard sends second touch MIDI events as MIDI note-on/off messages on a separate MIDI channel from its 'first-touch' MIDI note-on/off messages, then via the "Organ settings | Organ keyboards" screen you could potentially manually configure any virtual keyboard to respond to the MIDI keyboard's second-touch MIDI messages independently from whatever virtual keyboard(s) you have its 'first-touch' MIDI messages triggering.
For example, you could configure the MIDI keyboard's 'first-touch' note-on/off messages/channel to play the virtual Solo manual via the "Input 1" tab on the settings screen with "Key shift = Don't shift keys", and then also on the "Input 2" tab configure the MIDI keyboard's second-touch note-on/off messages/channel to play the virtual Solo manual with "Key shift = Shift keys down 1 octave".
However, you wouldn't be able to use it to play stops independently -- it could only potentially trigger virtual keyboards that the sample set provides.