I have similar situation. I would like to use my own WiFi router (Airport Extreme). Here is what I plan to do. Please advise if my steps are correct. Thank you.
I plan to:
1. put my Ubee DVW32CB to bridge mode
2. disable 2.4 and 5 GHz wifi on Ubee
3. unckeck Ubee as DHCP server
4. connect my Airport Extreme to etnernet port1 on Ubee
5. Make my Airport as DHCP server
6. Configure WiFi network on Airport