Turn off email confirmation when registering new user? (custom registration)

This problem of an automatic email being issued when a site member is approved is incredibly stupid but worse still is the contents of the mail that is issued can not be changed. I’m using lightbox on my website for the members form and I despair on how amateurish it is in the programming. What i want, and in this day and age it should be expected is that a site user fills in the form to become a member, using automatons I can send automatically an email with my text in it thanking them, I then want to be able to view the application and approve if the criteria is acceptable, when approving an automatic email is issued that I have no control over and no possibility to change the text, this I think is worse than moronic. I was promised by the blurb that this ascend tools to make a members area was fully controllable, the reality is disappointingly not like that and it seems that Ascend programmers are not up to the job to put right this stupid email issue with “Hi there…” text, even as bad you can not pre-approve a member.