Different Payment Options WHEN Using Discount Code?

Hey,

my first post here after many years working with opencart.



anyway i have a query in terms of doing the following


scenario 1:

user goes to check-out and DOESN'T use discount code so they are present the options of paypal or bank transfer.


scenario 2:

user goes to check-out and DOES USE A DISCOUNT CODE[/colour] so then they are presented with the payment options of cash on delivery,pick up from store,paypal and bank transfer.



how would i go around this?


thanks for your time

gary

bump