Change Only old domain to new

[ramesh_umk3]

I am on same host and just like to replace my new domain with old one..
Please correct me if i am wrong.

Planning to do:

Replacing my nameservers of old domain to new one , After 6 hours they are globally propagated !

After that i shall execute following query

UPDATE post SET pagetext=REPLACE(pagetext, 'www.oldurl.com/forums/', 'www.newurl.com/forums/');

And i shall update details in
Settings -> Options -> Site Name / URL / Contact Details
AdminCP -> vBulletin Options -> Cookies and HTTP Header Options

Done!
is that a pattern right ?

I am using VBSEO , hope all my links will be fine and redirected properly

Thanks in advance.