sure,

search forum for tethering bold, put in a string manually not copy and paste under standard modem in device manager or whatever its called. Then create a new dial up connection, choose standard modem and enter whatever the threads says your OP's settings are, crackberry has most of the OP's dial in numbers and passwords listed too I know. Then disabled IP header compression and 3 others in advanced settings of the dial up connection. Make sure you have blackberry device thing opened when dialing in, not desktop manager, the device thingy.