http://bugs.winehq.org/show_bug.cgi?id=30651
--- Comment #3 from Anastasius Focht focht@gmx.net 2012-05-14 01:24:10 CDT --- Hello Austin,
both registry keys are only for app installers (e.g. MS Money 2002) which are not subject of this bug, not ie5setup. They check these and don't start ie5setup.exe if present, hence no crash.
"The whole installer procedure can be avoided by pretending some components are already installed."
I don't see any benefit in wasting time on this as the installer is said to crash on Windows NT+ based systems too.
Regards