*.rar file?

nevermind, i think i found it! it needs to be opened with a "rar" opener commonly found free on the internet. then it will contain CDP files I'm thinking.
 
WinRAR is my favorite archiving tool. 7zip is ok, but you have to be very careful where you get it from i.e. only from 7zip.org and not 7zip.com.
 
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