Does any body knows how to change the Payment information name of Custom Payment Module.
Check for system > configuration > sale tab > Payment Methods and change Title of you desired payment method.
go to app/code/local or community/Spacename/Modulename/etc/config.xml
and search for following xml nodes and change Title their
<default> <payment> <title>here</title> </payment> </default>
if you want to know in which file you need to change the name, you can use Magento template path hints here : system> configuration > Advanced > Developer .
than switch to current store under Current configuration scope
than enable template path hints under Debug, than under Shipping method you can see from which file the label "cardpayment " is coming from....
Also in some modules, they mentioned that Name under System > Configuration > Payment methods > Title....