Here’s the Steps:

1. Start Parallels/VMWare, plug the Blackberry into the Mac, the guest OS should recognize the device, click on it in the Parallels/VMWare options, so that the guest OS takes control of the device.
2. Start the Sprint Blackberry connection software and establish a connection, so the Windows now has internet access
3. On the Mac Click the AirPort icon on the Menu bar and select Create Network, call the network whatever you like and click OK
4. On Parallels/VMWare, set the Network Adapter to Bridged. 
5. On Windows, go to (Start > Control Panel > Network and Internet Connections > Network Connections) and you’ll see the Sprint internet connection,  right-click the connection select Properties. Click the Advanced tab. On the Wireless Network Connections Properties dialog box check the “Allow other network users to connect through this computer’s Internet connection” check box in the Internet Connection Sharing frame then click OK.