Get rid of old .ini files - redirect them to registry!
If you remember, loooong time ago (Windows 3.x) we used .ini files for setting almost everything.
These files were often placed in %WinDir% (which is quite disaster when you try to implement LUA). What can you do about it (instead of logging, creating security templates and so on)?
There is functionality built-in Windows called Initialization file mapping, that allow you to "upgrade" your registry-unaware software -> this software will now be able to use registry :)
How to do it? It is quite simple - the best documentation I found is here:
http://www.oreilly.com/catalog/manwinreg/chapter/ch08.html#32309