Originally Posted by Themastermike
Is there a summary of what maps work with what years, and which maps might have been the same out of the 'box' if you will?
There are two categories of 990 maps; years 07-08 and then 09 and up. Last time I looked the maps say what year they are for, like 07 or 10. As for changes, I've always just downloaded a map for the correct category, in my case 09 and up, and compared it with what I'm currently running.