To answer your question, SMARTv8.3 can load most private server applets, but it may not be able to capture any color data, rendering it useless.
Take a look at the
SMARTv8.3 update thread for details on how to actually go about doing it.
If/when you jump that hurdle, there's the issue of RS emulators not being officially supported by … anything. There's no include with which to create scripts, nor can there ever really be one because the appearance of deobbed clients vary so much.
Robert has some tutorials like
this one or
this one, but that's about it as far a scripting resources.