Display Cash on Delivery payment method only if a cart variant is selected?

[skhn123]

Hello Members & Developers.

is it possible to display payment method (COD)  only if someone select product variant eg:
a product has option like : 1kg, 2kg , 3kg, 4kg so if user select 2,3 or 4 kg then in cart it should display COD available else other methods.

if anyone have any idea then please do share it with me.

Thanks.

[GJC Web Design]

Hack the standard payment module to check the weight as one of the conditions?

[jenkinhill]

Or maybe this would work? http://forum.virtuemart.net/index.php?topic=124078.0