Well, what exactly is your question? Since the BfME games are pretty old by now, there's not really much to say here^^
The game's engine can't make proper use of newer and more powerful hardware, so you can't really do much on that front. Modding doesn't require a lot of resources either (except maybe space on your harddrive), although it varies depending on what kind of modding you want to do. As for software, just... install the games, download and install Edain and have fun, same goes for modding and the tools you need to do it^^
If you want to get into multiplayer, you'll probably want to turn down the graphics to reduce lags (again, nothing you or we can do about it, the engine is just too old). Apart from that you'd need to be a bit more specific as I don't really know what your question is.