[lokisetup] CVS sync

[Ryan C. Gordon]

> Please try it for your own projects - it has been through some testing
> over here, so I am quite confident with it.

The next beta of Serious Sam will use this (I'm not patching between
betas, since half the problem is trying to get a functional installer that
works with all the versions of the retail disc, so users will
uninstall/reinstall the new version)...that should give it some heavy
pounding with minor consequences for any new setup bugs.

--ryan.