Renaming a signature name?

[cyber7]

Hi Guys (6.0.9)

I am tring to get my head around this, so please be kind

What I have is the standard user's signature as defined in Zimbra's management consol. This is a very plain signature called for this example:
user@example.com

Then I have a very advanced signature with html, data:gif images and more in his personal signature for this example called:
advance

Is it possible to rename the "advance" signature to the system signature called "user@example.com"?

I know I can manipulate the signatures using zmprov, but when chucking advanced html to it I get all kinds of errors.

Kind regards
Aubrey Kloppers