Guys help with the voice acting. (Grand Theft Auto 4)

Hello! We are a professional recording Studio.
But with voice acting of the games first.
We have a great desire to translate the game fully in Russian language, as well as experience with the selection of people to the characters in voice and character.
Of course with all the cut scenes and conversations.

I scoured the Internet and found a few utilities for working with sound.
To extract the files in the Ivaud format I'm using latest version of OpenIV.
And then, to extract wav files from the ivaud files I've used several utilities.

The first is GTAIVaud - But it opens only a single-channel compressed and uncompressed ivaud archives.
That is, only supports SFX sounds allowing modders to change the sounds of weapons and other...
Alas, working with multi-channel compressed and uncompressed archives, it can not do.
Accordingly, I can't even redubbed the beginning of the game.
Since even the initial cut-scene where Nico on the ship knocking at the door, is multi-channel compressed archive which is not editable in the utility GTAIVaud.
Stupid throwing error with the description as pictured below.

The second utility IVAudioToolBox - also only works with single-channel compressed and uncompressed ivaud archives.
But it has vkladka Multi-channel.
By clicking on that it just says Not available.

I thought it was the old version and the new is will be available.
But break the Internet and all the forums, I realized that this is the latest version and the project is closed.
The same situation and first utility.
Both tools the latest versions.
I tried to contact the authors of the utilities, but not any contact information I found.

At the moment we need a utility or some program or some way will be possible to collect\edit multi-channel compressed\uncompressed ivaud archive.
The program OpenIV will allow you to browse and extract archives of these wav files.
But bildit\edit them, alas, can not.

Really need your help at least some.
If I wrote on the wrong forum then please redirect me to the right place.

PS.:If I can do the translation GTAIV and it will be successful.
We will work GTAV.
Many thanks in advance.