If your parents took LFS off your computer because of something you did, then it wouldn't be a good idea to circumvent around it and put it somewhere else on another computer or memory stick or something. There is a reason they did it. Find that reason, correct it, and ask for LFS back if the problem was corrected. Going behind their backs to "sneak" LFS will only cause more problems.
I'm a parent, and I was young once as well. If your parents take something away from you, then there's a good chance it was for a reason.