how to add a specific word at beginning Subject line (Subject already exists)

[Uwe Brauer <oub@mat.ucm.es>]

Hi 

I have a function, most likely based on ancient code (based on 2.35)
that inserts a word or expression in the subject line, according to a
special field in the BBDB entry. 

That code works nicely, however if I use it to reply to a message, that
already has a subject then that expression is added at the end of the
subject line not at the beginning.

The relevant code is the line 
(message-carefully-insert-headers (list (cons 'Subject signame)))

So cons seems her the culprit. Any idea how to modify the line above to
have the expression inserted always at the beginning?

I had a look at message-change-subject. That function however is rather
complicated.
So if somebody comes up with a simple solution I would appreciate it

Thanks

Uwe Brauer