We do not want to Authorize OR Capture the customer’s payment at the time they place the order. We want to handle this completely manually when we are ready to ship. Is there any way to turn off the automatic authorizing of payments? All that I can find is an option for Authorize or Authorize and Capture. Doing this in two steps will only drive our gateway fees higher than they already are.
Can we somehow add a Comments box for customers to add a comment at the checkout? This is a feature that our customers really take advantage of with our current software, so we definitely want to include this.
Is there an easy way to remember a customer when they return? This is a feature that we really wanted when we were looking two years ago for software, as I find it a nice feature to welcome a customer back by name when they return to the site. This also makes logging in simpler for them (they only need to enter their password, as the e-mail address field is already filled in), and it automatically remembers their shopping cart (which is another thing- can the site be set up to remember shopping carts for customers that were not logged in when they added the items?).
Is there any way to 'stack' the different actions when processing orders? What I mean is can we somehow get the parts used on every order (specifically 'Summary', 'Payments', and 'Shipments') onto a single page to simplify and expedite order processing. A simply way to navigate from one order to another would be great, too.

Lastly, how can we add a flat weight to all shipments when pulling the shipping rates? Basically, if a customer’s order weighs a total of 8.7 lbs., we want the system to add 0.5 lbs. and pull rates for a weight of 9.2lbs. (which would automatically round up to 10lbs. when pulling rates). This helps to cover the weight of a box and packing material. Adding a small amount of weight to all items is much less accurate, and leaves us undercharging or overcharging on nearly every sale.
Thanks...
Rick