That's it, really?

I took the path of least resistance, and provide the path to the script file via XML-RPC.

After an hour of struggling with it, only to finally notice that I have to restart the server script (in addition to the Sugar Activity) if I actually want my changes to propagate, I have to say... that was pretty freaking easy.

By the way, why did nobody tell me about XML-RPC and its awesomeness sooner?