magento module customization: Pay pending order

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
Magento Expert Wanted.

Magento version
First Customization(Paypal Standard):
1, customer add some products to shopping cart, place order, but not pay it immediately.
2, The customer come back to our store, login, he could view his orders in the account panel. There's one action "Pay" after the pending order he placed last time.
3, customer click "Pay" action, redirect to payment method select page, he choose one payment method, click "Pay Now", redirect to third party payment gateway (ie. paypal, page.
4, customer pay the order, the order status update to "processing".

Second Customization(Paypal Standard):
We use Paypal Standard, with the "Currency Enabler for PayPal" extension.
When people redirected to Paypal and if the payment was not finished, the items in customer's shopping cart will disappears when customer go back to our store. We need the items are still in the cart until the payment has been received.

Please leave your quotation.We only want Magento expert on, thanks!

Skills required:
eCommerce, Magento, MySQL, PHP, Shopping Carts
About the employer:
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