This discussion is very timely for me as I am about ready to do the same thing to my TC-22 with a DX32. I have the parts, a SMC network card and Windows for Workgroups, just need the time to do it. I am going to try tackling this within the next 2 weeks or so.
My plan of attack was that I would install the card first and make sure everything would still load normally. With DOS machines, memory locations and interrupts (IRQ's) are all manually configured. There is no such thing as plug and play with DOS. I want to make sure that adding the network card won't interfere with the system as is.
Once I had the network card settled in I would install WFW. This gives me 3 things, a driver for the network card, a protocol stack (TCP/IP hopefully, but IPX if I have to), and a utility for mapping a drive to a network share(net use).
There are a set of drivers that come with WFW. If your card is not one of them you will need to install the driver from a disk. That is typically done by going to the A: drive and running the set up program provided by the maker of the card. With WFW already installed, it should just add the driver to the correct spots.
The driver would load in the config.sys. The protocol stack and mapping the share would happen at the beginning of the autoexec.bat.
I don't ever plan on running windows itself on the CNC. It really isn't needed. I just need the networking parts of WFW. They can all load in DOS and if all goes right the controller will just see the mapped drive as just another drive it can access.
One last thing that has come to mind that might be worth mentioning is that Microsoft released a patch for the TCP/IP protocol stack that came on the WFW disks. You may want to look it up to see if you need it.