Environment vars - where to set?

[Andy]

Hi Darren

Did you generate this message by replying to another thread and changing 
the subject? Because it's appears in the middle of another thread in my 
e-mail client (Thunderbird) in threaded view. If you didn't there's a 
problem with the threading somewhere. If you did - could you please 
start a fresh message for a new topic - otherwise the old message 
headers get preserved and it ends up in the same thread.

Thanks

Andy