Disable cod for a manufacturer

i used this code to disable cod for coupon code. it's working perfectly. but i also want to disable cod for a particular manufacturer what change will i need any suggestion?

Yuu will have to loop through all the cart products at checkout page and test the manufacturer of each product. If you find a match for the manufacurer in question you could set a session variable for this and do the same as above.

If you don't want to do the coding yourself, Restrict Payment Methods can do this. It can enable/disable any payment method based on a variety of rules, including manufacturer.

Feel free to take a look at the screenshots and demo site, and if you're interested let me know at www.getclearthinking.com/contact if you have any further questions.