Unidentified subject!

Hi !

I know that this is a silly question, but plz.. I just
nedd procmail to do 1 thing!

I need procmail to forward a mail, AND change the Subject !

Right now I have:

:2 c
^From.*
^Subject:.*
! henrik(_at_)tilly(_dot_)se

and that is working just fine.. but how do I change the subject ?!
I want the reciver (henrik(_at_)tilly(_dot_)se) to always get the Subject: 
0705224345

How to solve this !!

/Looking forward hearing from you !!!!

Henrik Tilly
SFV
Sweden