Hello,
I can do this task.
Basically, when the user signup outside successfully, we will insert these data to vbb5's database as well with some notes such as password encryption, ip address,....
When the user sign-in outside, I think we should make a AJAX request to vbb5 site first then when user click submit then submit this native form to outside login page later.
Do we need to check ajax logon to vbb is successful or failed? What happend if the user change vbb or outside password, so both password is not the same. If fisrt login is failed, do we login continue to outside page?
That's my assumption.
Thanks,
Gnouv