looking for upgrade instructions to 10.10 without formatting

[Tapas Mishra]

Hi,
I am having Ubuntu 10.04 server running.
In my previous messages I had mentioned some cron.dead letters in
root's home directory.
I would like to upgrade my production servers which are currently
running on 10.04 to 10.10 release without formatting them.
I am looking for instructions for same.
I have checked the community page for the same
https://help.ubuntu.com/community/MaverickUpgrades
can some one provide me a relevant how to for the same.