I think you misunderstood me. I've not been able to get any custom voices to work on GMPC either. I've had no problem on three different Nuvi models and also ok with GarminXT on Nokia. I've tried custom voices on several different versions of MpbilePc and with different OS (XP, Vista, and Win7(both 32 & 64bit). Maybe we are both doing the same thing wrong and if someone's got a solution or if you work it out post it here. I was just making the point that it's possible to get Microsoft Anna (Text to Speech) on XP. You have Anna on W7 i know, fine. So stop laughing and then try to find a way to get the Dark Lord of the Sith rumbling on GMPC and if you do, share, baby, share, 'coz i've given up ;)