How to deploy Qt-dlls for windows

[jpn]

But one question: where should i install the Qt-dlls?
QtCore4.dll, QtGui4.dll etc...
Installing them in the application folder means every qt application has to install his own version of them (WengoPhone does it like that).

Yes, I think that's quite common way do deploy the libs on Windows.

Wouldn't it make more sense to install them in c:/windows/system32?

Would it cause troubles when any other installer updates them?

The problem is that any other installation overwriting them with older versions could even prevent your application from launching. For example, let's say your application depends on new functions introduced in Qt 4.2 and some other installer overwrites the dll's with 4.1 ones.