Join Date: Jun 2003
Location: Vancouver, BC, Canada.
Interest: Canoeing, Hiking, Fishing and Bear kissing.
Unlock codes are nothing new, other venders offering GPS maps such as Bluecharts for marine maps sell you the complete package, but you have to purchase unlock codes for the region you want to use.
Not that I would ever advocate finding a way around the unlock codes, but I certainly know they exist.
Also, the association between your GPS unit ID and your unlock is simply so a user cant share his unlock code for any given map product with another GPS owner. This does not mean that you cant purchase a new GPS and use your paid for maps, it simply means that you have to let your vendor know you have a new GPS and update them with the new GPS unit code. I did this myself after Wilderness Seeker tossed my old GPS into the Squamish river.
Lastly, someone above mentioned that you can only have 100 map tiles loaded onto any Mirco-SD card you insert into your GPS, I'm pretty sure that limitation on mapping segments is actually 2025, and that with a software update on your Garmin GPS, you can use up to 4GB micro-SD cards. If you still have spare room on your micro-SD card after installing 2025 map segments, you can load more onto it but they wont show up on your unit. There is a way around this too though, changing the name of the database file.