IGO Primo English voice selection

Good day fellow forum members..I need some help please. Just bought A second hand IGO Primo gps. the screen is in english but the voice in Serbian. there is no english voice selection under regional...only dutch and german and few others. Can anybody please help me to get english voice on the GPs? thanking you in andvance.

All iGO/Primo voices are here : http://www.navitotal.com/forumdisplay.php?84-Languages-voices-speedcams
When you have enough memory, you can set up a TTS voice (says street names, eg. "turn the second left on Baker Street"), when the mamory on the other hand is less than 128MB, you are stuck with non TTS voices (no street names, just "turn the second left")