A friend of mine is experiencing her Macbook (not sure of the particular vintage) starting to get wonky on her, and apparently a consult with Apple support has indicated that "reloading the OS" is the only solution. She's lost her OS X media and, not wanting to spend any $$$, is disinclined to take it to the Apple store. She's apparently running 10.4.11. I happen to have 10.5.5 media. Can I help her out or no?