Is it possible... (to make game in source)

Hi, I was thinking about buying torque, but I was talking to my friend who has it and he said something that wasn't quite what I wanted.

He said that you compile the source you get, and that acts as an 'engine', but the actualy code of your game is external, in a separate script that's encrypted.

I don't want any external scripts though.

Is it possible to just write the code for the game inside the source and compile the whole thing? I'm assuming it would be a bit of work, and I'd have to overwrite the script that asks for the external file...

But has anyone done this? Is it possible?

Thanks,
Alex.