script error in downloads

Its all about dependancies. Each script is part of a bigger sum and you cannot (not always) just take a script out and plug it anywhere else.

Either take everything with you, or learn and edit out what you don't need. In any case, you'll need basic-to-moderate understanding of what you're doing.

I found for myself that the Bootcamp wasn't the best project to start with, plenty of advanced techniques I still would get a headache trying to mod. If you're at the beggining stage, I'd rather recommend:

UNITY: 3D platform tutorial
UNITY 3D Student

Finally, read the UnityAnswers FAQ ;)