That looks like a business map image, the navboot is in the OS image mate and I'm pretty sure that navtweak won't edit the OS for the business nav.

Also navboot is for a mk4, is this what you have (but in mono mode)?

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.