Is there a way to add coupon codes during checkout process?

Right now the only place for customers to see they can add coupon or voucher codes is by viewing to the cart before choosing checkout. I'm not sure why but in my store clicking checkout skips showing the cart and goes right to checkout whereas in the demo store it shows the cart first.

I'm using the AquaCart theme with 1.5.6. The only ways I can see to resolve this are either to somehow shift the coupon code options to the checkout process or to always force someone to view the cart before continuing on to checkout. I'm not sure who the coupon codes are in the flow this way, they will get lost as an option for anyone who just clicks the cart icon and chooses "checkout" without choosing "view cart". They're not going to know that coupon options are only available in the cart view.

Yes, you can use vqmod for it.
http://www.opencart.com/index.php?route ... on_id=9983

I'm running 1.5.6 though & the mod indicates it's for 1.5.3.

I was test with my latest 1.5.6 without any problem.

I'll give it a try, thanks. In the meantime I've edited site links which point to the checkout to point to the cart instead. Not the best workaround for now, but functional.

I tried in version 1.5.6 and it seems NOT working...
Any success?

I didn't get a chance yet, will try soon.