Hey Chris,
AppleScript is probably your solution.
Here's what I would do with Typinator:
tell application "Typinator"
set TypinatorExpansion to plain expansion of rule "cs " of rule set "Names"
end tell
--> Christopher Stone
tell application "Keyboard Maestro Engine"
setvariable "tinExpansion" to TypinatorExpansion
end tell
Drop TextExpander on the Applescript Editor or better yet Script Debugger (The demo reverts to SD-Lite after 20 days, but it's still way more powerful than the Applescript Editor.)
TextExpander's syntax will be a bit different than Typinator's, but you can probably figure it out. If not let me know.
-Chris