urgent help please with MIDI pedal

I just got an old awesome midi pedal called the X-15 Ultrafoot.

The pedal has two expression pedals, and 10 pushbuttons/pads. (and two buttons to cycle through additional banks, and a "mode" and "bypass" button)

Somebody please help I am on the verge to having amazing control.

What I want to do is have each pushbutton be assigned to a parameter, which is easy to program. Then I want to make the expression pedal(s) also be assigned to that last selected parameter. How do I do this?

How can I make the expression pedals control over the parameter remain exclusive to just the last selected parameter?!

Somebody save me please 🙂 thanks