Adding a step to opencart checkout

Hi
Please I would like to add a step to my checkout page where I can give my customers the oppourtunity to allow a finance institution fund their payment on any item purchased as well as create a discount adn interest rate.
Here is the idea:
Once my user visit the checkout, they see a step where they can choose a finance institution to fund their payment. So for example the financial institution funds 50% of the payment at an interest rate of say 8%. Therefore, the total price would increase by 8% (the interest rate) and further reduce by 50% (the funds the financial institution helps lays off).
Would like to know if anyone can get it done
Thanks

Hi,

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