Add this to the end of that setting
PackInfo=(PackageName="AnnouncerProxy.uax",Description="Proxy")
So when your all done it should look like so:
The UMODs will add this for you. The zips will NOT.
[Xinterface.Tab_AudioSettings]
BonusPackInfo[0]=(PackageName="AnnouncerMain.uax",Description="Default")
BonusPackInfo[1]=(PackageName="AnnouncerEvil.uax",Description="Evil")
BonusPackInfo[2]=(PackageName="AnnouncerFemale.uax",Description="Female")
BonusPackInfo[3]=(PackageName="AnnouncerSexy.uax",Description="Aroused")
PackInfo=(PackageName="AnnouncerProxy.uax",Description="Proxy")