Hav you tried just sharing the files and folders on each system?
Are all of your PC's, Laptops attached to the router? If they are then you only need to enable file sharing.
On the PC or Laptop, open up explorer with the following procedure:-
1: Right click on the start bar
2: Left click on explorer
Thsi opens explorer. Then , on the left hand side of the explorer window right click on the C drive and left click on sharing.
Creat a new share and allow full access (this is the simplest solution but not very secure). You will have to decide which files and drives you want to share.
Once this has been completed you should be able to browse to the PC and files required.
Reamin positive. The affect on those around you will amaze.