There are no sounds in Cakewalk. The sounds are either on a soundcard on board the PC, or on an external synth that you can connect to via a MIDI interface. Cakewalk only has the
descriptions of which sounds reside at which patch number, and only for those instruments that they've written a definition file for. Cakewalk only records and sequences MIDI messages and digital audio. You have to have something to make the actual sounds.
If you hook the FB-01's MIDI In (assuming it has one) to the MIDI Out of the computer's MIDI interface (assuming it has one) with a MIDI cable, and assign the port settings of the individual tracks to the MIDI Out port, yes, you can certainly use
the FB-01 with Cakewalk.
The drums are addressed through Channel 10 as a General MIDI standard (it might not be so on the Casio). The way GM sets up drums is, you use Channel 10; the GM-compatible synth has drumkits assigned to channel 10. The individual parts of the kit -- the kick, the snare, the ride, etc. -- are assigned to individual note values, not separate individual patches. I forget which notes correspond to which part of the kit, but let's say the C below middle C is the kick, the D one whole-step above is the snare, etc. If this track is assigned to Channel 10 of a GM-compliant synth, these notes will trigger these sounds. If it is assigned to any other channel, then you can choose a patch like Glockenspiel and the notes will now trigger the C and D pitches of the glockenspiel.
-AlChuck