1. Install version 372 of MzScheme. (Don't use the latest
version. Versions after 372 made lists immutable.)
2. Get http://ycombinator.com/arc/arc3.tar and untar it.
3. Type mzscheme -m -f as.scm and you should get an Arc prompt.
4. If you ^C an Arc program, you'll get the Scheme REPL. Use
(tl) to get back to the Arc REPL.
5. If you have questions or suggestions, post them on the