As far as the configuration I believe this can be done by directly editing the registry with Win32::Registry or a similar module for accessing the registry.
Start with these keys:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
and
HKEY_CURRENT_USER\RemoteAccess\Profile\
There may likely be more registry keys that need modification before this works. I would try these out and maybe followup with a more Windows centric support forum to find out more about additional keys.
The connection itself can be manipulated using Win32::RASE.
<jc> Why do people persist in asking me stupid questions?
<Petruchio> <insert mutually recursive response>
--an exchange from #perlmonks on irc.slashnet.org(2 March 2009 1345 EST)