Upgrading to core 3

Spent this evening upgrading to core 3 from core 1. I don't have a cdrw. Initially I tried installing using yum. I was getting a weird error saying udev and kernel are conflicting.
Later found a cool hack way to install from hard disk downloaded iso image file.
Fedora core 3 has pre installed firefox 1.0, evolution 2.0, gnome 2.8, kernel 2.6 and is much faster than core 1.