Its not difficult to have both installed. 6.14 and 6.13.
I've got both working, with Mapsource, OSM and SMC maps all available.
I use 6.13 for real work, but if I want 'pretty' for a printout say, I can then switch to 6.14
instuctions for how to do this are at:
http://www.aukadia.net/gps/lwg_3.htm#updater
Life's a bit more awkward if (like me) you've just got your nice shiny new toy for Xmas including City Navigator 2009. This comes with 6.14 as standard. And Garmin in their wisdom have changed the map format, so simply re-installing doesn't work. You'll get 6.13 working fine but won't be able to see the 2009 maps.
Link here to GPS Passions forum includes a little batch file to convert to the old format...
http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=118955Install CityNavigator as normal & unlock your maps etc.
Create a new directory e.g. C:\Garmin\CNE2009
Extract the batch files to here (see the readme file)
From the command prompt run the batch file and it'll go and convert your maps. Your directory above will now contain a load of old style map format files.
Follow Frankies steps above to 'downgrade' to 6.13
Job done. I've now got 6.13 running 2009 maps. The difference in performance is noticeable, even with my brand new laptop. On Vista but no problems (if you're using user accounts run the conversion batch and the 6.13 setup as administrator).