Thanks for putting up with the installation instructions you found, and thanks for trying to make life easier for the next person. :)
The instructions at /install are actually more than six years out of date. As of August 2009 (http://arclanguage.org/item?id=10254), Arc officially stopped depending on MzScheme 372. Shortly after that, the official releases of the language ran dry, and the Arc website (this website) entered a more preservational mode of maintenance. It even preserves those obsolete instructions!
Development of Arc continues thanks to unofficial efforts like yours. The most up-to-date material for Arc newcomers is on a community-maintained website: http://arclanguage.github.io/
Thanks rocketnia - sorry I was afk for a few days. I had no idea that installation details changed. Is it possible to update the instructions on /install? I may update my setup to install racket first. Thanks!
