From a page in the online tutorial to which I posted a link in my previous post: "If you use Microsoft Exchange Server, you could share your Contacts folder with your coworkers." You need to have Microsoft Exchange Server installed in order to share Contacts or Calender in Outlook.
To get your Contacts copied over to other computers, I believe exporting to a .PST file instead of a .txt file will work better. In other words, I believe exporting to a .PST file and then importing that file on another computer will allow carrying the folders over to the other computer and not simply import all Contacts into the Contacts folder.
To export to a .PST file, go to File, Import and Export, select Export to a file, select Personal Folder File (.pst), click Next, expand the Contacts folder by clicking on the plus sign next to it, select the specific folder in the Contacts, and complete export. Then, import that into other computers.
I'm not absolutely sure but I believe exporting to .PST will also allow you to carry Distribution Lists over.