If LUA scripting is disabled in the evaluation kit then no, it won't be possible. If it is not bundled with Engine.exe to start a game from scripts, then no, it won't be possible.
Leadwerks is worth every penny though, twice. If you are serious about creating a game then I would recommend you purchase the engine. Besides, there is only support for licensees, and it's hard to go without when you're new to the engine
Cheers!