Can I hardwire a network bypass?

I don't think that this really counts as networking, but that is the nearest on offer.

My system consists of two laptops running 7, 1, sometimes two desktops, running XP, 1 Laptop running Ubuntu, and one desktop running something that looks like a cross between Unix and Sun Systems.

My main problem is that the Win 7 machines wont talk to the other machines, beyond taking small amounts of data from them, but refusing access to all of them.

My XP,Ubuntu, and the "whateveritis" machines all communicate quite happily.

... If somewhat slowly.

What I want to do, is bypass all the silly protocols, and hard wire the damn things so that they will pass data to each other at something like the speeds that the component manufacturers claim possible.

Or at least at something like the speeds that the HDDs are supposed to be able to handle.

My latest effort to move a chunk of data from the machine that was assembling and processing it, to a large storage disk in another machine, was just silly:

11 GB == 5 Hrs.

There has got to be a faster way.

Any ideas anybody?