Packaging Methods

I wanted to open a discussion about the current packaging methods and improvements we could make to them. Along with opening a discussion, I thought I would give us a start at what has been working for my company. Attached is a patch that makes the following changes:
- Renamed the "All products in one package" to "Break packages by FedEx Max Weight" since that's what it actually does.
- Added a third option "Break packages by specified weight" so a max weight can be specified by the store administrator. This is very important to my company. FedEx charges an additional $30 fee for any packages over 70 lbs so I would like to avoid this if at all possible.
- I have coded it so that products over the specified weight will be put in their own package.
- It takes all the products that fall under the specified weight and adds their quantities, prices and weights together. It then generates the number of boxes needed based on the total weight of all these products and calculates averages for the quantity, weight and price for each box.

This is by no means a perfect patch, but it solves a few issues with the current method.
1. With the current method, if your cart has a few really light items (25 lbs), a really heavy item (135 lbs) and a few more light items (25 lbs), it will create 3 packages. The patch changes this so it would ship 2 boxes combining the smaller items.
2. The second being that it allows me to specify not to quote over 70 lbs as to avoid the additional $30 charge to my customers.

If you can test it out or review the code, I would appreciate either of those. I am looking forward to great feed back including what I overlooked ;).

Cheers,

Antoine