How to add specific directories to "updatedb" (locate) search path?

I keep my digital music and digital photos in directories in a Windows partition, mounted at /media/win_c on my dual-boot box. I'd like to include those directories—but only those directories—in the locate database. However, as far as I can make out, updatedb.conf only offers options to exclude directories, not add them. Of course, I could remove /media from PRUNEPATHS, and then add a whole bunch of subdirectories (/media/win_c/Drivers, /media/win_c/ProgramData...) but this seems a very clunky way of doing it—surely there's a more elegant solution? (I tried just creating soft links to the Windows directories from an indexed linux partition, but that doesn't seem to help.)