Login Control

We're starting to move from using our own custom login controls to the ones that shipped with VS 2005, but I'm not sure how to adapt them to our purposes. We have stored procedures in place that I was hoping to use, but I don't know how to get the login control to use them, or the tables set up in the database. Am I misunderstanding how the (not so) new membership controls are supposed to work? Can someone point me to a good tutorial that shows how to use them in this fashion? Thanks.

If your costom controls are performing fine in respects then no need to change this VS 2005 controls, dont mees of it things when it is ok