Anybody do valve stem seals?

[4g63tcrazy]

My friend Jake (iwanta4g63t) needs new valve stem seals for his talon. Has anyone done them before and can help? Or have the tool we could borrow? We don't wanna take the head off if we don't have to. So if someone has the tool for it without taking off the head that we could borrow that would be cool. I've been reading up on how to do it on vfaq but if anyone know's a different or better link let me know.