If you're not, here's another way of doing the same thing. PCAnywhere PCAnywhere is a product offered by Symantec. The difference between Microsoft's Dial-Up Networking scheme and PCAnywhere is that you can actually see an image of the remote PC's desktop. Instead of using Explorer to manage files, you can actually manage the remote PC just as if you were sitting in front of it, mouse and all. You can run programs on the remote machine from your dialed in machine too.
File transfers are simple in that there are buttons on the dialed in screen to perform the task.
Security is easier. You simply name all of the machines and assign passwords. If you need to chat with the remote operator, that's built in. Just click on the chat button. An illustrated script guides you through the configuration of a client or server machine.