Assuming you set up your network correctly, you should have one admin user that is identical on all the networked computers. Long in to both computers using the same username and password, make sure to correctly share the files for transfer, then simply copy and paste them from one machine to the next.
We do it all the time.. In fact, I've recently been updating a variety of users from Windows XP to Windows 7.. As long as both computers are on the network, sharing all the folders and files, with the right permissions, allows me to simply copy the files from one computer to another on the network.
Hope this helps.
what hardware and software do i need to transfer files from one to another computer both using windows 7.