How to connect my XBOX 360 to my PC?

[michael]

I use a USB 3G modem to connect to the internet on my PC. If I use a straight-LAN cable to connect my Xbox to my PC while the PC is connected, will the XBOX pick up the connection? If not, how can I connect my Xbox to the internet without actually going out and buying a router etc. If it makes a difference I use Windows 7 and it's an Xbox elite. Thanks in advance.
If I buy a router will I be able to connect it through the 3G if both the PC and XBOX are connected to the router?

 

[Kamyar]

you can't because the xbox modem is SI so you have to connect it directly to xbox or buy a router.
you also can wait for hacking team so maybe they will be able to change the SI into nonSI somehow but i doubt that.

 

[JOSHUA]

this has always been a bitch for me. sitting them right next to each other can interfere with the wireless. ive been recommended to buy whats called a "crossover cable". looks like an ethernet but somethings switched in side. ive never gotten ethernet cables to work between the two.