CSL for Sqwk Box

I have asked a couple of folks how to do this and so far no reply so maybe someone here knows.I fly online on the VATSIM network, lots of VFR. A couple of us want to fly the B25 there but in SquawkBox there is not a B25 listed as a type of aircraft. Right now we are using the Remarks area to show it.How can I add the B25 to the CSL for SquawkBox so that it will come up in the menu for filing flight plans. I know the file is CSL_ICAO.csv and can be opened with Excel. Just don't know what the columns are for and what info to place in them.By the way guys thanks for a absolutly great aircraft and all the CD's are great. I have spent hours in here going over them.Thanks for any help.Terri KelleyVATUSAZFW Assistant ChiefInstructor