Here's the steps to get it to work if you don't have an existing MapSource Product.
For those of you who have Garmin GPSs with mapping capability these topos are incredible. Much better than the Garmin ones. The only downsides are no Street Names (though there will be for BC, AB and NB at some point this summer). That means no Auto-Routing, but if you bought this for "outdoor" use who cares about street names, considering the maps are of higher quality.
Download and Install "Garmin Training Center"
Download and Install the latest Mapsource Update
This will give you a working mapsource install with a basic world basemap (very low detail)
Download and install Ibycus' Maps.
If you've already installed these maps you may need to go here as well.
Not sure if the above steps work cause I haven't tried it myself, I have existing an existing Mapsource product. If you try it and it works please post confirming that it worked so others will know.