how to upgrade fc6 to fc7

1. download some rpm from fedora.redhat.com
2. install fedora-release-7-3.noarch.rpm & fedora-release-notes-7.0.0-1.noarch.rpm
rpm -Uvh fedora-release-*Preparing...

3 . upgrade yum & python,python-lib
rpm -Uvh yum-3.2 yum-metadata --nodeps

4..install new rpm

5.. intstall python-urlgrabber-2.9.9-5.fc7.noarch.rpm

6.. yum update yum

7...yum install kernel

8. yum upgrade

9. restart...

10. done.