Reinstall font book

I'm having some issues with some fonts and i was wandering if it's possible to reinstall font book ( and how ) with all the default fonts and preferences.

fonts are installed in hd/library/fonts/ I say, just delete them all, (except for the system ones, which don't matter cause they wont delete anyways) & delete fontbook.app, than talk to someone who owns a mac and get them to send you their untampered fonts folder w/ fontbook.app.

probably not the best solution but, it should work.