[support] ubercart question

I've got a question about ubercart. Well, actually a few questions: 1. Can you set it up so you have a one time sign up fee, and then have a recurring charge as well? Does this depend on the payment gateway? Does authorize.net support this? 2. Can I automatically create a user and log them in before I redirect them to the checkout page? I would be doing this in a custom module (basically a landing page with contact info) 3. Can i take some fields that I'm getting from a landing page form (custom module's form) and put them in ubercart for the billing address of the user i just logged in (above #1) so it is prepopulated at the checkout page? Brett Evanson