Hey it might be useful to share what i have found works for me....
Firstly:
there is the site:
http://www.sharemyroutes.com which i and others have posted recognised track and routes onto for public downloading.
an example is here:
http://www.sharemyroutes.com/routes/Aus ... tails.aspxbut Secondly:
you can create a path in google earth freeware version (- ideally in conjunction with refering to official maps and paths as i don't really agree with bush-bashing as there are so many great tracks around already),
save the path on your computer,
then convert it to the file type your GPS uses with the freeware program ( I use GPSbabel ) then upload it onto your GPS unit and off you go.
I do this as i use a Garmin etrex H (cheaper non mapping GPS using AA batteries with a high-sensitivity antenna) this way i can still follow a track without constantly having to double check the map - i mark the paths' waypoints onto the map and can follow it through the GPS that way.
Hope this helps...
cheers, liam