Also check Prof. Marrink's website:
http://md.chem.rug.nl/~marrink/science.html

There are good instructions to get started, for both lipids (2004 FF) and
proteins (MArtini)
> 
> Message: 6
> Date: Thu, 17 Jul 2008 07:55:19 -0400
> From: "Justin A. Lemkul" <jalemkul@vt.edu>
> Subject: Re: [gmx-users] How to do CGMD in GROMACS?
> To: Discussion list for GROMACS users <gmx-users@gromacs.org>
> Message-ID: <487F3327.6030608@vt.edu>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> Read just about any of the papers from Marrink's group.
> 
> -Justin
> 
> Anirban Ghosh wrote:
> > Hi All,
> >  
> > I am interested in doing Coarse Grained MD in GROMACS. Is there any 
> > module in GROMACS with which I can do this? Please tell me the procedure 
> > of doing CGMD in GROMACS. Thanks a lot.
> >  
> >  
> > Regards,
> >  
> > 
> >  
> >  
> > *Anirban Ghosh*
> > *M.Tech Bioinformatics*
> > *University of Hyderabad*
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> 
> -- 
> ========================================
> 
> Justin A. Lemkul
> Graduate Research Assistant
> Department of Biochemistry
> Virginia Tech
> Blacksburg, VA
> jalemkul[at]vt.edu | (540) 231-9080
> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
> 
> ========================================

-- 
Kia Balali-Mood, PhD, CBiol, MIBiol
Postdoctoral Researcher, Department of Biochemistry, 
Oxford University, OX1 3QU, UK
http://sansom.biop.ox.ac.uk/kia/ , tel. +44 (0)1865 275 (380 or 275)