Many thanks, I will hopefully get a chance to try this tonight and will let you know how it goes. Thanks again for your help with this.

once you learn by time the new settings you can practice in the future with most complicates ways such having both wifi & dhcp etc ... but for now as basic & less complicate is to change the HB ip address (is a must to avoid confict), disable as more possible settings (to be more natural as pure modem) but not change the adsl settings such vci/vpi/protocol etc ... and set the 2925 via static or dynamic ip by just adding the values from the HB & reboot both ... if you also add the current ip addresses & subnets i have mentioned should make it much more easy

I have made the updates and it works!. Can't wait to get the second WAN so I can see how the load balancing works.

Thanks for your help, greatly appreciated.