The visemes can be mapped to any morph in the "head" of the figure. If you're doing a cartoon for example you might only have 5 or 5 visemes morphs.

The emotion poses can be mapped to any face (FC2/FCZ) in any linked runtime. For sanity's sake those are usually in ...Runtime\LipSync folder but that's not a requirement. The FC2 files can be mapped to any face pose.

Probably the strangest thing about the viseme files is that the use of internal or display names of the morphs is ... kinda random?

Like the blink morph uses the internal name:

<Blink morph="eyelidBlink" openValue="0.0" closeValue="100.0" closingTime="0.167" closedTime="0.034" openingTime="0.134" />

But the eye side to side uses the display name of the dial ...

<EyeSideParm  parmName="Side-Side" maxValue="5.0" minValue="-5.0" forerun="0.1" minimumInterval="0.8" toSideTime="0.1" staySideTime="0.7" backToNeutralTime="0.1"/>

You will be doing a bit of trial and error figuring that out. If some parameter doesn't seem to respond to talk designer try using the other naming for the dial.