In reply to:

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To actually compile and download the resulting binary to an Empeg
requires an entirely different skill/knowledge set, and again,
people on the BBS can help there.

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You'll need a compiler.
RioCar.org has downloads for a Solaris cross-compiler and a DIY compiler-compiler. See this thread for more information on the DIY compiler-compiler.

If you aren't running on x86-linux, you'll need to manually recompile some of the executables used during the build:
cd scripts && mv mkdep mkdep.orig && cc-o mkdep mkdep.c &&
mv split-include split-include.orig && cc -o split-include split-include.c && cd ..
Note, we used the hosts cc, not the cross-compiler in the above step.

Next, you'll need to compile the code.
This thread gives both instructions and a nify proggy to help you. You'll need to tweek it to use the latest file names.