Why back in my day we put the files on floppy disks and walked uphill both ways through 50 miles of snow!
Or you could do as I had to do once: hook up your computer to your N64 Gameshark, use GSCC to write the file into N64 RAM, switch the cable to your other computer, and use another copy of GSCC to read it back in.
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HyperNova Software is
now live (but may take a few tries to load) currently down; check out my PSP/DS/Game Boy/Windows/Linux homebrew, ROM hacks, and Gameshark codes!