=== Copy the cal to your raspberry pi ===
A suggestion is to create a directory on your pi (within your home directory) that can hold all your tunes.
Something like /home/pi/flashfiles/tunes
Using something like winscp (or scp if you're on a mac, or any number of other methods to transfer files to your pi), transfer your tune file to this directory:
<pre>
pscp C:\somedirectory\thisismytune.bin pi@raspberrypi.local:/home/pi/flashfiles/tunes/thisismytune.bin
</pre>
=== Checksum the cal ===