FTDI DLL Hell

I am trying to rename the FTDI drivers for their FT232R chip, with their blessing but no support, to support a medical device we’re developing. We need to ensure that the driver stack we test doesn’t get overwritten whenever some other device gets loaded. I have the driver package working but am still getting “cross talk” between drivers that use the standard driver stack and the renamed one. In other words, our application, a C# VS 2008 app, sees devices from both stacks. Even worse, when we check the driver version in our app, we get a value but are not sure which driver stack provided it.

If anyone has any experience renaming the FTDI driver package files, and not just the INF files, please respond.

Thanks