In article <89d88700-edf8-49d5-9449-
4e7f5f42df6a@m25g2000yqc.googlegroups.com>, miso@sushi.com says...

In theory, this procedure will leave you with Garmin mapsource and an
open source topo map on your PC.

You need to have some Garmin software on your PC before it will let
you install mapsource. So you do this installation first:

Since you did not receive any replies and I had DeepFreeze on the OS 
partition and some time to spare, I thought I would give this a try.
I had no Garmin or MapSource on the drive. 

Download the Training Center:
http://www8.garmin.com/support/download_details.jsp?id=835

Install it

Completed with no problems

Then download the MapSource update:
http://www8.garmin.com/support/download_details.jsp?id=209

Install it.

Completed with no problems.   Unchecked the box that would have opened 
MapSource upon install completion

Go to
http://www.gpsfiledepot.com/
Pick Nevada.
Pick Nevada topo.
Download the map

Good directions. No problems

Open up the map in mapsource.

Opened the map by selecting "Nevada Topo" in the left upper most small 
window in MapSource's opening page. 

I hope someone without mapsource installed will try it out and let me
know if I got this procedure down correctly.

It does work as you outlined.    I do not have an actual paper topo to 
compare it to but it does show at the highest detail every single cow 
path and possible stream almost to the point of confusion.