Thanks! I've put a lot of time and effort into this, so I'm glad to have some support from others. Yeah, I've thought about grabbing a VM in order to run commands and such, I just haven't done so since I've been working on other aspects of the mod. For one, I've decided that I'm going to move in the direction of a Lua interpreter for the computers (or more specifically, a Lua VM in Lua to run bytecode). I'm aware that there will be a disadvantage in speed as compared to running the code natively, but running it in an interpreter gives a wide host of advantages for me in making the mod, such as better limitations as to not harm the host environment or be too resource intensive, the ability to have persistent computers, and potentially new features for the Lua side as a whole (such as an actual debug library and even the ability to JIT compile =P) so in my opinion, it will be worth the disadvantage.