|Still, I was contemplating the idea of using Ethernet crossover cables rather than the router. |
This is the only way to directly connect two computers. However, since you also seem to want both to access the work network/internet as well as share this one folder of documents, there is an easier way. Well, easier for someone who know's about shares, user accounts and permissions.
Since both computers could access each other over the LAN, the direct connection isn't necessary. If you create a shared folder on one of the two computers in question, and put appropriate shares, with appropriate permissions on said folder, you can choose who does, and who doesn't have access to the data.
Alternatively, you could create a shared folder on a file server within your network and again, use user accounts and permissions to control who does, and who doesn't, have access to that folder.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.