Danish Backer how to remove buddypress sign up location and use default in wordpress?

I have installed buddypress and oscommerce plugin in wordpress.

But i need to a common login and registration, so i started making custom registration plugin. And for that I need to remove the buddypress registration page and use wordpress default signup.

Also if there any other way around please let me know.

My ultimate aim to have a common login for oscommerce wp plugin and buddypress.

Thanks in advance,