Before you install Winamp, give Mediamonkey
a try. It's a great music database that is much faster than Winamp Media Organizer (or whatever it's called) on large collections. It can handle all sorts of music files, including OGG and it can even support the older Winamp plugins, so I catalog my FLAC files as well. It also has some pretty powerful functions.
It's freeware for the basic version, ~$25 for the Gold version. You won't be disappointed with either.
Now, I'm just waiting for them to port it to Linux.