to save you some time and work on your garmin program....
i found this site last year and the program is awsome.
http://www.ibycus.com/ibycustopo/
if you follow the steps there you get a topo map for free that kicks the s**t out of the 150$ garmin ones. I like it anyways. this guy built them out of the department of natural resources maps. hope you all find these maps as useful as i do! i believe that this topo has all of canada as well!
thanks for the google Earth WMU's as well!
K