I have a CaptiveWorks 4000 HD. Most of your post is over my head, but I'm happy to look into it.

Can you start with the lowest cost solution and what additional hardware / NON-software one would need to do this? Like a list?

Then I can probably figure out the software after I make the physical hook ups.

My CW 4000HD is etherneted by ethernet cord to my 5 port router then from router 1 ethernet cable into my broadband modem.

Thanks for anything. I'm not a techno NooB just not familiar with card sharing