Updating from 5_2_1 to 5_3

[BSD]

Hi,

I want to upgrade my system from RELENG_5_2_1_RELEASE to 
RELENG_5_3_RELEASE

I am using cvsup with this cvs-supfile

> # Utilise le mirroir francais
> *default host=cvsup5.fr.FreeBSD.org
>
> # Ne pas changer
> *default base=/usr/local/etc/cvsup
> *default prefix=/usr
>
> # Numero de version de FreeBSD
> *default tag=RELENG_5_2_1_RELEASE
>
> # Ne pas changer
> *default release=cvs delete use-rel-suffix compress
>
> # Met a jour src ports et docs
> src-all
> ports-all tag=.
> doc-all tag=.

 From what I have understand the steps that I must take to upgrade 
properly will be :

1. Change the cvs-supfile to : *default release=RELENG_5_3_RELEASE

2. Run cvsup : /usr/local/bin/cvsup -L1 -h cvsup5.fr.FreeBSD.org 
/root/cvs-supfile

3. cd to /usr/src

4. # make -j4 buildworld
5. # make build kernel
6. # make installkernel
7. # boot -s (optional, please confirm)
8. # mergmaster -p
9. # make install world
10. # mergmaster
11. # shutdown -r now



Are these steps ok ?

Do I have to upgrade or clean my /usr/ports - knowing that it is 
updated twice a week on the 5_2_1_RELEASE ?
If so, how ?

Any pointer beside the Handbook ?


Thanks for your support.

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