My computer has been acting up lately. It will beach ball sporatically for several seconds then be ok for a minute then beachball again. This is most noticable while working in final cut making digitizing impossible due to drop frames or freeze frames. When i went into disk utility it says i need to start from my mac osx install cd and then go to disk utility but i cant remember how to boot from the cd. I did a search on the forums and in finder Help menu and couldnt find an answer. I think its just holding down a key after the dong but which one? Also if anyone has any other advice it is always much appreciated.