Actually I was documenting it last night just in case I had to do it again. Here it is:
1. Establish connection to internet.
2. Open terminal screen and enter:
wget
http://www.navgator.com/download/Set...x-3_1_1.tar.gz
3. uncompress and install Mariner:
tar xvf SetupMariner-Linux-3_1_1.tar.gz
4. Give your usrid access to uucp (group 14) and the lock (group 54):
su - enter (to be a super user)
vi /etc/group - enter
i enter (puts vi in insert mode)
change the line: "uccp::14:uucp" to "uccp::14:uucp,olpc" where olpc is your userid.
change line: "lock::54:" to "lock::54

lpc" where olpc is your userid.
Note: the little happy face above is a colon followed by olpc
press esc key
enter: ZZ then press enter to save file
enter: exit to go back to your userid
6. Start Navgator by entering: Mariner/mariner
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7. Mariner should start.
I also loaded it onto my windows PC because it was easier to figure out how to use it then did the same thing on XO.
To use some charts I wrote some to the SD card on my PC then moved it to the XO. To load them into Mariner open File Charts... It will have file tree scroll down to the media folder and click on it. It takes a long time to open. When it finally opens click on your SD card name, keep going down until you see the actually .kap and .bsb files. Click on first one and scroll down to last one and press shift click to select them all. Then press Import, then Done
To bring up a chart: right click on one of the panels and select Add Instrument and slect Chart viewer.
Right click again to get Select Chart and - from list. Select the one of .kap files (not the BSB ones) and voila.
Wasn't that easy!
Paul