How would I go about using the digital pins to get over this problem?
You don't.
You would fit a multiplexer chip on the front end of your existing analogue inputs, like in this project:-
http://www.thebox.myzen.co.uk/Hardware/MIDI_Footsteps.html
How would I go about using the digital pins to get over this problem?
You don't.
You would fit a multiplexer chip on the front end of your existing analogue inputs, like in this project:-
http://www.thebox.myzen.co.uk/Hardware/MIDI_Footsteps.html