Create R Node with 2 inputs

Hi,

I would like to be able to create a Knime R snippet node that takes 2 inputs, as I want to be able to compare two sets of data. The only way I can think to do this easily is to copy the existing Knime R Snippet code and add a second input port. However, I haven’t been able to load the source code for R extensions into the Eclipse developer environment. Is there an easy way to do this and to copy an existing node to create a new node?

Thanks,

Liz