Not with engine extensions (the ones that are new in 3.0). If you figure out how to do it, it might be possible to add it to the UI with a toolkit extension.
But first things first: I guess it could work if you
1) set up the haxe/nme environment variables depending on your OS. You can look here
http://haxe.org/doc/build at the links Haxe on Windows/OS X/Linux (ignore everything about compiling, you just need to set up the paths)
2) go to the games-generated folder in your stencyl workspace, and run
nme test project.nmml blackberry
on the project.nmml file of your game.
Maybe it's not that easy, and I'm missing some important steps here...