Thanks for the offer of the hosting but I have my own dedicated servers so wouldn't be needing any extra.
This is possible but I would not be able to do anything with this for a couple of weeks as paying clients always come first and always will...that and i'm moving house so will be out of action for a couple of days.
Have a start yourself, really shouldn't be that difficult and should mainly be template changes within the produc.tpl file with changing the location of the form tags and the form action....html stuff really.
This php script will cope with that input aswell as the multiple add to cart.