Upgrade my blog from Movable Type 4.01a to MovableType 4.1 on Dreamhost

I have tested the upgrade on the MT unofficial blog. It is smooth.

Now I recorded the detailed upgrade procedures of David Yin's Blog.
Backup
1) Login the MovableType system, Backup all blogs of this system, by tab system > tools > backup

2) Use Export feature of the system, by tab system > tools > export
Export every individual blog.

3) SSH to the Dreamhost.
Use tar command to backup all related files.

tar czvf backup.tar.gz ~/yinfor.com/

4) Go to control panel of Dreamhost, Goodies > Manage MySQL > phpMyAdmin
Export the whole database.

Now I have the full backups on different levels. I am safe even the following upgrade fails.

Upgrade
1) SSH to Dreamhost

cd ~/temp/
wget http://www.movabletype.com/download/personal/MTP-4.1-en.tar.gz

2) Decompress the package

tar xvzf MTP-4.1-en.tar.gz

3) Copy the decompressed files into the mt cgi folder. I use mtcgi as the system folder.

cd ~/temp/MTP-4.1-en/
cp -r -f . ~/yinfor.com/mtcgi/

4) Now launch Firefox.
Enter http://www.yinfor.com/mtcgi/

Click "Begin Upgrade" to continue.