http://bugs.winehq.org/show_bug.cgi?id=31231
--- Comment #3 from hibbsncc1701@yahoo.com 2012-07-17 09:29:15 CDT --- I've figured out what causes this bug. It's caused by having more than one copy of the install media mounted. Removing the extra copies makes the installer work. Although vsh56vs from winetricks is necessary to actually see the EULA, Install location, etc. pages.