Hi rich,
The BT Access Manager software that is supplied on the E170 dongle probably won't support the built in 3G modem on your laptop, so while you can use the SIM card with the device, you would need some software to manage the connection or configure it manually. There may already be some software pre-installed on the laptop, in which case the information you will probably need is the APN (btmobile.bt.com) and the username/password (bt/bt).
Unfortunately I don't think the BT helpdesks would be able to provide any support/guidance for this configuration.
Hope this helps!
Tim