Using Assignable Controllers on XP-50 to control FLStudio Parameters

Hello all,

We've got these two handy assignable controllers on the XP 50. In FLS,
or any decent software host, you ahve the ability to automate just
about any parameter and assign it a controller, usually just by
right-clicking it. However, you have to know the midi number that the
controller "set-off" to affect that parameter.

So far, I've been successful in using the mdulator (midi control #1) to
control many things (filter, panning, etc), but I want to use these two
assignable controllers to automate things as well. How do I do that?

- O