Garmin Mobile XT 可以同時使用4個地圖的方法

JDP

Garmin Mobile XT(PPC) able to open 4 maps together.
you must set your map name follow these name....
Gmapbmap.img -->base map.
Gmapsupp.img -->your map.
Gmapsup2.img -->another map.
Gmapprom.img -->another map.

GMXT will read into these file and show on screen.

all your maps may save as "\MiniSD Card\Garmin\".

Reference: http://www.smart-mobile.com/forum/viewtopic.php?t=123654