canyou do this stuff on a tom tom go 510
No....
The biggest reason to get a Garmin these days is that there is a huge amount of free mapping available for them.
Also don't get a Mac that does not do the PC simulation... The amount of GPS software available is little to none.
As I pointed out above, the entire canadian topographic database is available for Garmin maps for free.
A shot of the Margaret Lake Area with Ibycus' Maps.
A shot of the trails in the area with the Calgary Trail Maps. Note on the GPS, you will see these both at the same time.