Urgently Require some details in Vbulltin 3.6
 

We are trying to integrate vbulletin with another system to do that we are writing plugins,
but not sure which hook to use in following scenarios:

1> user is added via admin cp and normal registration. (Need hook name for both scenarios )
2> user password is changed via admincp or by usercp change pwd form. (Need hook name for both scenarios )
3> user is banned from admincp or from the front end. (Need hook name for both scenarios )
4> user is deleted from admincp ( we are using userdata_delete )

Please can you let me know the hook names for 1, 2 and 3 above