Currently CMDB* has it's own MyCoollection.cool fie for users personal movie information (i.e rated,tagged,wished etc movies)
But not a file for rated series episode.
When CMDB is online it automatically download the series episode from the server in this location (C:\Users\Public\Documents\Coollector\Images\MoviesDpt\Episodes for win 7). No problem in it.
But when you rated some of the series episode and you accidentally delete the episode folder,all your rated episode will be gone.I guess most of the users doesn't aware of this.And it could be done also by format of your PC.(Because users would like to back up just the MyCoollection.cool file.)
I guess the problem why you don't want to merge it to MyCoollection.cool.
How about a different Rated Episode.cool?
*Coollector Movie Database
"Coollector is a Drug,I am addicted " -Swarup Basak