As some of u may already know that Google has made an agreement with the US Government to disable the Turn by Turn Voice Navigation for Android phones outside of the USA. So installing the Nav Launcher app alone will not help.

But there is a workaround solution to this problem.

I've tried the following method and it works on my Motorola Milestone
I have Turn by Turn voice navigation using GPS + Brut Google Maps 4.2.0.4210-brut13. (see video below)




Brut Google Maps 4.2.0.4210-brut13


Features:
international navigation using Google Maps Directions
map tiles caching on SD card
force-enable MT. If you're on Eclair or some custom Donut and don't have multitouch zooming, then maybe this will enable it.
force-enable Buzz feature
fix for map shift issue in China
option to hide zoom buttons
installable on non-rooted devices
could be installed beside original app

Credits:
canadiancow for starting a brainstorm; an idea to use maps directions as backend for navigation; great Nav Launcher app; helping and support
TAPP for enabling "Navigate" button; first version for non-rooters
acamar for his research on map shift issue in China
many, many people for testing it, complaining ;-), helping others, etc.
Google for making this great app and service and for not sending C&D to me so far ;-)

Download:

http://ul.to/jpo4al/maps4.2.0.4210-brut13.apk
http://www.mediafire.com/?tm2jnzhecyq
md5sum: 9480c1443850ce201724c39dbf0249fa

Mirror/different versions (thanks to 5m00v3r !):
http://rapidshare.com/users/OJW69I

Installation:

Just download & install. Then you will have both original and modded maps installed at once. If you want to have only my version, check section below.

Note: You may need to download Nav Launcher first from the Android Market to get it to work.

Source: http://forum.xda-developers.com/showthread.php?t=630887

This post has been edited by pcphobic: Jun 7 2010, 10:39 AM

You cannot just download and install Nav Launcher just like that. Below is a description on Nav Launcher

Launches Google Maps Navigation in countries outside the United States.
Supports navigating to contacts, or a typed/spoken destination.

This requires that you have already installed the modified Maps with Navigation for use outside the USA. See forum for instructions.

Source: http://www.androidfreeware.net/download-nav-launcher.html

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Added on June 6, 2010, 11:12 pmGoogle Maps is free. Only thing is u have to use your 3G connection. But if u are like me on Digi's Smartplan RM68 unlimited data package, u won't have to worry at all since the max charge per month is RM68 for unlimited internet data usage. Once u hit the 3gb cap, they just throttle your speed and u can continue to use free of charge.

This post has been edited by pcphobic: Jun 6 2010, 11:13 PM