or you can go here for more options on tethering
http://forum.ppcgeeks.com/showthread.php?t=78502
you can't brick your phone installing a cab. the worse that can happen is you having to hard reset your phone. to dl the cab on that thread...the easiest way is to use your phone's internet to logon to this forum and go to that thread. click on the cab file and your phone will ask you where you want to save it. save it in your external card (if you have one). it'll only take a a couple of seconds to dl it. once done, find the cab and install it by clicking on it. install on device when it asks you and let it run it's course. the come back to the forum for other instructions on the next step (if there's any).