WSUS 3.0 - out of the box / connectcomputer on SBS 2003 R2, the client PCs get their updates from WSUS. How do I change that?

out of the box after running connectcomputer, the client PCs get their updates from the SBS 2003 R2 / WSUS 3.0 server, right?  How would I change that so the client PCs go out to the microsoft / windows update servers like a stand alone PC would?

and this brings up several questions -when I set up a new XP sp2 machine, I manually run windows update, install microsoft updates and then run through express updates several times.

if a stand alone machine wasn't updated like this, but was set to automatically update, would it (eventually?) get to the same point?

Except for microsoft update and the resulting office updates?  Microsoft updates has to be run manually?

And with WSUS - all updates in xp and office 2003 / 2007 are ok to install, right?  So a properly configured wsus machine get the client PC to the fully updated condition?

thanks!