Ok, maybe some people still feel confuse about making Garmin unlock or find some maps. so I decided to write a summary and make it clearly. But I still need more time for finsh. also All of the actors have risk, I will not assume the the loss when you try.
How to use normal gps
First, you need install garmin mobile xt into your pda.
than go to setting->about you may see xxx ID(the last one in the top)
copy it and using keygen v1.1 fill the id to card id. click generateyou may get unlock id. copy yhe unlock to notebook. than save as SW.UNL
than copy it to ./garmin
after that you can try does it work or not
Find maps id and tools:

For Maps Resources:

Other:

GmapTool is a simple program that can deal with img files. It is GmapTool,
you can get it here: http://w15.easy-share.com/12120771.html

First copy your maps to PC and make a backup copy.
Gmaptool can show some details of this file:
>gmaptool -i gmapprom.img

On last lines you can find product and family id:
F: PID 1, FID 197, City Navigator Europe NT v9
FID 197 in hex is 00C5. You need to put this 2-bytes number into typ file, exactly at offset 2Fh-30h, low byte first, so it goes C5 00. Use some hex editor for that.

Map ID:
==========================
Code-2 North America City Navigator V4.00
Code-5 Europe City Navigator v4.0
Code-6 North America City Select v4.0
Code-11 Americas BlueChart v4.00
Code-12 Europe City Select v4.00
Code-13 Atlantic BlueChart v4.00
Code-14 Europe MetroGuide V4.00
Code-17 Australian City Navigator V4.00
Code-21 North America City Navigator V4.01
Code-23 South Africa City Select V4.00
Code-26 Australian Metroguide V4.00
Code-28 Atlantic BlueChart v4.01
Code-32 Taiwan Topo V5.00
Code-35 Europe City Navigator v5.00

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