A few notes about things I recently found out about Primo voices:

1. You can use Loquendo 6 *and* Loquendo 7 voices with newer versions of 2.4 (confirmed with 351648 and 405512). To use Loquendo 6 voices, just comment out the "tts_engine=" line in the info.ini file in the voice - and it will work fine with Loquendo 7 TTS drivers. This is somewhat significant because the Loquendo 6 voices are a lot easier to customize. So Loquendo 7 works with both version 6 and version 7 voice files!

2. When I modify anything in a voice file, I don't extract or re-archive anything. I simply open the voice file in WinRAR 5.01 and then open the file I want to edit with Wordpad (by double-clicking the file in WinRAR). I can then edit the file all that I want and save it in Wordpad when done. WinRAR will ask if you want to update the archive - just say yes and everything will work as expected. The only "gotcha" here is that if the file you want to edit has an extension and Wordpad is not the default app for the file type you want to edit, there is no way to tell WinRAR to open the file in Wordpad. So, I just set Wordpad as the default app (at least temporarily) and then all is well. Makes it VERY easy to edit voice files.

Just a few tips to add on to what was mentioned in the OP...

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