So I have created a custom mobile theme by copying the magento's "iphone" theme to my package and modifying it.
i.e. app/design/frontend/mypackage/iphone
In the cart Page(http://www.abc.com/mystore/checkout/cart/) there are following items...
1.product lists which are added to cart.
2.Delivery method choose (country, post-code). On selecting it shows "Delivery options dropdown related to the country".
3.Subtotal, Tax, Total price (changes according to Delivery method).
4.Payment method(paypal, amazon, credit-card checkout)
I am asked to divide it into four pages.Like..
1.product listing with a checkout button.
2.On clicking this button it will redirect me to a page which have the log in form for customer or guest. and a delivery option button.
3.On clicking the button it will redirect me to a page which have the Delivery option. total, tax etc with a payment button.
4.On clicking the payment button it will redirect me to the payment method page..
and finally from this page to checkout page,where the billing address,delivery address,payment details are present in one page.
Please suggest me how it can be possible ?