its not the mod chip that stops you playing on line, its the bios your using - you can't play copied games with an original bios and you can't play xbox live with a non-original bios
i dont use a mod chips in the xboxs i mod - i just flash the tsop, safer, cheaper and easier
xbconnect and xlink are free programs that tunnel hte data from system link (not xbox live) between 2 computers over the net