Can two computers be linked into the same DSM 750? I'm running Windows Vista on my laptop and Windows 7 on my desktop. I have Windows Media Center on each computer. I have added the extender on my PC with the on-screen access code from the DSM 750. When I try to extend from my laptop, I receive an error that I need a new access code. Will I disrupt the established connection with the PC if I link into the laptop? Thanks for the help