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I do not have a mapsource disk or mapsource on my computer.  The link to download it lets me but will not let me run it.  It also has a warning that say it will not work if I do not already have it. I take it that mapsource is the only way that I can use the topo maps from here is this right.  Does anyone have some info on how to get these maps on my gps. It is a garmin vista  computer has windows xp.
If you have some info for me I would realy appreciate it.  Thank you for your time

I have a garmin vista but did not get mapsource.  I followed the link to garmin's site but it stated that if you do not have mapsource already you can not use it.  So I downloaded it anyway hoping it would work but it denies me when I try and run it.  So is there a way that I can use the maps from this site even though I am not able to get a version of mapsource.  I take it that basecamp is a portion of mapsource.  Please give me some advise on how I can get some of these topo maps to work.  Any advise will be greatly appreciated.  Thank you for your time.