script access to fields on contact Access/Notify checkbox

Is there a way to access the checkboxes 'giveaccess#' and 'sendemail#' (# = row number in list) for contacts listed under the Access tab?

First, we do not want the general access area turned on so we use client side scripting to prevent this.

Second, we have multiple customer centers and unfortuantely NetSuite does not allow different welcome letters for different centers so I wanted to run a server script 'beforeSubmit' which would look for individual contacts who have the 'Access' checkbox checked and the 'Notify' checkbox checked and turn off the 'Notify' so the default welcome letter doesn't fire off and then send a custom email out depending on the role.