iGo and Primo are both very sensitive to changes in their ZIP files (voices, data, branding, etc).
Unlike 'normal' ZIP files, you typically can NOT just unzip the file, change something, then zip it back up with the same name. iGO will balk at the changes to the zip file (internal verification routines will fail).
This tutorial will show how to edit these sensitive ZIP files successfully using WinRar. Some may tell you there are ...


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