Accessing shared folders from MCE PC

  Hi! I have 4 computers in my house, all belonging to different people, all
connected to the same workgroup.  Each computer has folders shared so other
people in the house can access shared files.  For some reason my new MCE
computer (Dell Dimension 8400) won't remember passwords for the other
computers in our workgroup, so every time I want to access a shared folder on
someone elses computer, they have to be there to enter the password for me.  
Is there any way to get my MCE computer to remember these passwords (like XP
Pro does)?