I will try and answer your questions

What exactly are you trying to achieve? I want to install Outlook 2007
without Cached mode on and have the Send/recieve settings setup so that the
user can work offline.
How are you trying to achieve this? Configuring the MSP with these settings.
What are results? Mixed results. Sometimes I get the cached mode off and
sometimes it is on.
What were your expected results? That it would work like my first answer.

As far as the reg setting, we have over 6000 users and I cannot be sure they
all have the default profile name of Outlook. I can "assume" that, but I am
sure some have been changed.
http://www.howto-outlook.com/howto/cachedmoderegkey.htm