>We are using Drew Speedies Maxframe, so I am not so sure what the code is. However, the difference between the "good" installation and the "bad" one, is that in the former VFP9RENU.DLL is registered. In the latter, when I tried to register, I got "VFP9RENU.DLL was loaded but could not be registered... no entry point"
>Could that be the problem?

No, VFP9RENU.DLL cannot be registered. It has to be in the same directory as VFP9R.DLL which can be registered.