BB Device Software :: How To Sync From Phone To Calendars Without Deleting BB Calendar Inputs

So a little background about the way I have my calendar set up. I have multiple email address set up on my BB, and then use the BB calendar to keep all of these different calendars in one spot. It also allows me to have a color coded system in my calendar (work is one color, personal is one, etc), see the picture.


This is probably the place where I'm different than others, I started keeping my calendar up to date on the BB before setting up my outlook calendar, yahoo calendar, or either of my google calendars. Is there a way to sync from the phone to the other calendars without ending up deleting my BB calendar inputs or ending up with duplicates or ending up with all of the events under one calendar.

I would like to sync my work one with Thunderbird/Lightening, my personal gmail calendar with gmail, my other side project gmail calendar with gmail account2 and my yahoo calendar with yahoo.