Discount by Payment Method

[bart]

I am try to give customers who pay by Bank Transfer a 10%.

Ideally i would like this to show on the final total when the customer selects this payment option, i don't mind having to use a coupon code or discount rule to achieve this however i would want the coupon code/rule limited to this payment method to stop everyone using it.
I can see you can limit the coupon code use to some conditions but not payment method.

Before i start hacking at the code i thought i'd ask if anyone has any good ideas how best to achieve this.

Cheers

[Martin]

Narry a clue I'm afraid... Would be interested in hearing what you came up with in the end though...

[bart]

Unfortunately after looking at the code i've not really been able to get anything to work. I think this is going to have to be something that i'll have to play with long term...

I have set up some jquery to display a <div> containing some more info when the option for bank transfer is selected, unfortunately this doesn't effect the order total.