Is it possible to generate amputated diagrams with MadGraph?

I stumbled upon MadGraph recently while searching for a simple possibility to create Feynman diagrams in double line notation (see http://arxiv.org/abs/1010.0748). To be honest, I only had a very quick look at the features and syntax of MadGraph because I'm not sure yet, whether it can do what I'm searching for. Especially, I'm interested in creating amputated QCD diagrams in double line notation. So far I had the impression that MadGraph can only handle graphs with external fields. Is that true or is there some possibility to generate amputated graphs?

Thanks in advance,
Michael