I tried searching through all the txt docs I have with my MAME emus, but I can't find anything that describes why there's that Network option.

It asks for an IP address, subnet and default gateway, and a server name. Was wondering what this is for? Anybody know, does this only deal with roms to play off of your pc? Please elaborate on this. I did search though, so sorry if this has been asked before. thank you.

if you bother to read the readme, its for samba use so you can use the roms from your pc instead of loading it from your xbox hdd

sorry this wasn't good enough for you.