You could ask Jonathan Orwig (see http://www.evensongmusic.net/orwigorgan.html), he's a member here; he's also written a piece on a particular animals red nose ...
I've posted this one here before, but maybe it's helpful (again) for the 24 pieces de fantaisie: Olivier Latry's corrections to the 24 PdF:
http://sydneyorgan.com/Latry1.pdf
Here's one in Breda: http://www.youtube.com/watch?v=9nGsjgoFub4
Difficult instrument, knobs are quite close, looking down on/in them may cause confusion.
Even more so, once visited a concert for in the 'Thueringer Orgelsommer' series played on organ AND alphorns (in the Bachkirche Arnstadt); 'simple' music, but sounding really nice (and not only 140dB@1mtr.)
Oh yes - and no electricity anywhere near it, organists wearing 'period' clothes and shoes, be sure to have your brain reset to +200 years ago (so forget about your current means of communication/transport/existence etc..).
Looks like cantabaile no.30 is a second version of no.2 - maybe try that one, scorch didn't show me no.2 but did show no.30.
Should not be difficult to work out the differences.