Unbinding S-PgUp and S-PgDn

[Aaron Griffin]

Hello all,

I'd like to bind S-PgUp and S-PgDn inside screen.  In order to do
that, I need to unbind them from urxvt.  xev reports PgUp and PgDn as
'Prior' and 'Next' respectively.

I have added:
urxvt*keysym.S-Prior:
urxvt*keysym.S-Next:

to my .Xdefaults, but to no avail.

Does anyone know how to get this sort of thing working, so that
Shift-PgUp and Shift-PgDn are not trapped by urxvt, but passed through
to the application?

On a side note, it'd be great if this same thing could be done with
mouse scrolls too, but I think that may be wishful thinking.

Ideas, thoughts, help?

Thanks,
Aaron