Linux Yum DELETED mysql 4! Can I install mysql 5 and be on my way?

[Nathan Gross]

Hi;
On FC3, for some silly reason, Yum deleted my mysql 4.1x production server!
I do have my data. Now that I am in this hole, maybe I should go to mysql 5.
Can I install mysql 5, and it will migrate/work with my existing data?

Thanks,
-nat