Originally Posted By Murveman
I also cannot figure out how to run existing .tpr files that I've found online, particularly from this website.

What do I do?

I converted the 2 tape files (*.tpr to *.tp) to work with Nestopia.

First go to Machine > External > Tape Recorder > File...
and select SPARKHOUSE.tp or URBANCHAMP.tp

File > Open...
and select the Family BASIC (J) (V3.0).nes file

LOAD {don't press ENTER yet!}

Select > Machine > External > Tape Recorder> Play

Now press ENTER!

When the flashing cursor reappears your saved program should be restored

Type RUN

PS: If you use the LOAD command without the filename, the option "Use image file naming" should be disabled.