the .hword are your filter taps. If you don't know what filter taps are you need to read about DSP for a bit. The filter taps are you coefficients of you FIR or IIR filter design.
The coefficients get reserved in xdata space (DSP functions need to be utilizing combinations of xdata and ydata space to get the speed out of the special DSP assembly functions.)
you could also reserve your coefficient space in C like with the keyword CONST (but you still have to use the compiler specific keywords to get the variable reserved in the right xdata space)
you don't actually need the filter designer. There are plenty of free ways to do it:http://t-filter.engineerjs.com/
but you do need to understand DSP and dspic assembly so you can build it correctly.
Start with simple stuff like echo filters and reverb filters so you can figure it out more easily.