Sorry to burst your bubble, but the only way to play Left 4 Dead is with Steam. Without Steam you cannot even start up the game (believe me I've tried) and so you're totally at the mercy of your school's internet. Try going to a fast food chain or a motel with free internet. Your ping will be high, but at least you can connect to Steam and play some singleplayer.
The internet is already accessible on your psp it just needs a place to connect to. If you have a wireless hotspot without a password you can connect but if it needs a password then you need the password. I don't think you can connect without using a wireless connection.
The same way you make any internet connection. The internet does not care how long you will be connected. If you want to connect a device to the internet and already have internet service without WiFi you could unplug the PC ethernet cable from you router or modem and plug in the new device with a different ethernet cable. If you don't have internet service you must get internet service to connect.
Without the modem you can not connect to the internet.
you can't...!
You need some kind of connection to connect...
ANSWER;you dont
The only way to connect to Internet without using WiFi is to have a data package with your cell phone provider.
No. The messenger has to have Internet to work. How will it be able to connect to the the signals it require without Internet?
DSL or Cable
No
You would have to have wireless internet.
To connect to the Internet without Wi-Fi on your Xbox 360, you will need an Ethernet cable. Simple connect one end of the cable to the rear of the console and the other end to the router.