Stuck at Belfast City I thought I would have one last go at this. As you can tell by this post I was successful.
From this page here are the important bits.
1. Pair your blackberry to your windows machine, via bluetooth.
2. Set up an Internet APN.
Click Start > Settings > Control Panel
Double-click Phone and Modem Options
In the Phone and Modem Options window, click the Modems tab
Select Standard Modem and click Properties
Click Change Settings
In the Standard Modem Properties window, click the Advanced tab
In the Extra initialization commands field, type the following under CODE:
at+cgdcont=1,”IP”,”internet”
Click OK.
In the Phone and Modem Options window, click OK.
3. To configure dial-up networking, complete the procedure that is appropriate to the operating system you are using:
Click Start
Select Connect To
Click Setup a connection or network
Click Setup a dialup connection
In the Dial-up phone number field type *99#
Type the user name web and password web
In the Connection Name field type BlackBerry
Click Dialing Rules
Make sure the profile created in Task 2 has been selected, and then clickOK
Select Connect to establish an internet connection.