I've read through what seems like an endless number of posts trying to figure this out and was unable to find the answer I need. So, here I am, going to ask the question.

I have a 2005 BMW 330Cic ZHP with MKIV nav. I successfully upgraded it to version 27.1 a while back and changed the default voice to the UK English. Last night, I updated to version 31, was able to change my splash screen, etc. I renamed the gb_f.csf to usa_f.csf and vice versa in the Mk3 folder. When I installed the software, I encountered no problems. The splash screen changed, but the voice has again reverted back to the US English. When I inspect with navspeak, the voice files are correct (where usa_f.csf speaks in the gb_f.csf voice).

So here, are my questions:

1. Why did the voices not change? Has something changes since version 27.1 to change the voices?

2. I know that I can't just change the voices again, and try and install because the version number is the same. I've read several posts referring to changing the version number using a HEX editor. My question about this: what file do I open in the HEX editor to change the version number, and what exactly do I change when in the editor?

All the material on here is invaluable when dealing with (and customizing) these nav systems.

Any help would be appreciated.

Thanks in advance!