On my earlier post i did get one answer, stating that it would be extremely difficult to achive, why so, could someone explain why this is so hard? I know lots of commercial webshops that uses what i call onepage checkout.
I read in another OC-forum thread that it would require some AJAX and stuff, if so, is that a problem?
Im not a developer or coder, just fiddeling with some HTML, CSS and javascript on my own little webshop, so go easy on me.

In the end, isnt it all about making it simple and easy for the customer to make orders? I know many people that just places stuff in the cart, and then go to the checkout to instantly see what the total would be, including shipping and other fees.
That isnt possible if its not a true onepage checkout.
IMO all info (products, billing info, shipping info, coupons and total costs should be visible at the same time, and if the customer is happy, then just click on "confirm order"
If this would be possible in a mod, then it would be great, as long as it works!

Maybe there is some laws in some countries that perhibit this kind of fast checkouts, but it should then be something that could be changed in admin.
Any thought around this?