The easiest way to post your trail ideas is by copy/paste from Google Earth as follows:

1. Open up Google Earth.
2. Create a new 'path', drawing along the track you wish to describe.
3. Once the path is complete here, on the Google Earth sidebar right click it and select 'copy'.
4. Come back to the track node creation form here, and paste (control+V, or on the right mouse menu in most browsers) the clipboard contents into the large track data field.
5. In the 'Treat data as' drop down, select 'KML'
6. Complete the rest of the content form and save in the usual way.

You can go back at any time and edit the data by simply using copy/paste from a new path. The copy/paste works in both directions too; you can select all (control+A in most browsers) the contents of the track data box and paste it back into Google Earth.

You can edit or amend your ideas at any time by using the 'Edit' tab when viewing them. Either find them manually in the list of trail ideas or visit my account and look in the 'threads' tab.