I think that Pro/E requires a network card to function - the physical address of the network card is the Host ID of the computer. Without this, Pro/E won't run.
So I don't think that you can borrow a license without a network adapter. Each of the license files has the Host ID of the computers that are allowed to use it coded in, which means that copying the file won't work.
One way that may work is to go to the PTC website & request a change to one of the license files, so that it will work on the laptop - but this isn't borrowing the license, just transferring it to another computer.