Since OneCare has dependencies on other components and also works, like other security software, at a low level of the OS, I would not count on being able to successfully move it from one PC to another with any software the purports to be able to do this. You can probably successfully move your data and other programs, as these programs generally work pretty well, but I agree with Jim that you should install OneCare fresh and activate with the Qwest LiveID.
-steve