I'm trying to connect to Xbox Live on my other 360 from my bedroom. Our main computer/router is about 30 feet from this system, and I'm not sure how to proceed from here.

I've tried multiple theories on connecting from my laptop to my router, to no avail. I've mentioned many times before that I'm a complete know-nothing when it comes to networking, so I guessed it wouldn't hurt to try out different ideas.

However, the bottom line that I'm trying to get to is: What is the best way to get my 360 to connect to the internet that doesn't require me to shell out $100+ on a wireless adapter?