okay, i have a program that lets you play system link over the internet that is connected to ur pc LAN router, if i install a mod chip, can i still play system link over the internet?

If your mod chip has a switch that lets you choose between an alternative Linux friendly BIOS (ex Cromwell) and Microsoft's BIOS, then XBox Connect will work fine. In another words, if you still possess the ability to run XBox games with your mod chip installed, you're good to go. Only Microsoft's XBox Live checks to see if your XBox is modded. Word of advice: look around the websites you have a question with, look through all of their FAQs. I got the answer to your question from XBox Connect's FAQ here (http://www.xbconnect.com/faq.php).  more