Compiling RPMS for RedHat 7.3 from CVS Source

Hi all,
To start I am still very new to samba and this is my first attempt to 
build RPMS from the CVS source. I am trying to use the script you have 
in /packaging/Redhat.
I keep getting an error that samba-PVERSION cant be found, see below:

[root@LSALNXS01 RedHat]# pwd  /usr/src/samba/packaging/RedHat
[root@LSALNXS01 RedHat]# sh makerpms.sh
chown: getting attributes of `samba-PVERSION': No such file or directory
tar: samba-PVERSION/samba2.*.spec: Cannot stat: No such file or directory
tar: samba-PVERSION: Cannot stat: No such file or directory
tar: Error exit delayed from previous errors
error: Name field must be present in package: (main package)
error: Version field must be present in package: (main package)
error: Release field must be present in package: (main package)
error: Summary field must be present in package: (main package)
error: Group field must be present in package: (main package)
error: License field must be present in package: (main package)

I am not really sure where or how the PVERSION variable gets set. I 
assume that it is a file somewhere stating the current build version or 
what it should be
Do I have to edit something somewhere to make this work? I have looked 
through the newsgroups, RTFM etc but can't see anything to point me in 
the right direction.

Can you please tell me where I should look, what I can do to work this out.

Thanks,
Mark