I'm almost finished with a multiplayer mod for choicer voicer as well,
it uses steam's API for peer to peer connection, so no port forwarding needed. It auto syncs pack files so no one needs to download and extract packs, the host just clicks play and everyone has it! once all the lines are recorded, you can all watch it together live in synch as the host has a master button to play the final product. It also takes advantage of the character system so you can see your custom character of whoever's turn it is.
I'm like 99% done and just need to stress test it and work out some bugs.